{"id":1087,"date":"2010-09-10T00:06:28","date_gmt":"2010-09-09T16:06:28","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=1087"},"modified":"2018-01-01T19:25:55","modified_gmt":"2018-01-01T11:25:55","slug":"%e5%85%b3%e4%ba%8ejs%e4%b8%8b%e6%8b%89%e8%8f%9c%e5%8d%95%e5%8f%af%e8%ae%bf%e9%97%ae%e6%80%a7%e9%97%ae%e9%a2%98%e7%9a%84%e4%b8%80%e4%ba%9b%e6%80%9d%e8%80%83","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2010\/09\/%e5%85%b3%e4%ba%8ejs%e4%b8%8b%e6%8b%89%e8%8f%9c%e5%8d%95%e5%8f%af%e8%ae%bf%e9%97%ae%e6%80%a7%e9%97%ae%e9%a2%98%e7%9a%84%e4%b8%80%e4%ba%9b%e6%80%9d%e8%80%83\/","title":{"rendered":"js\u4e0b\u62c9\u83dc\u5355\u5b9e\u73b0\u4e0e\u53ef\u8bbf\u95ee\u6027\u95ee\u9898\u7684\u4e00\u4e9b\u601d\u8003"},"content":{"rendered":"<p>by <a href=\"http:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"http:\/\/www.zhangxinxu.com\/\">http:\/\/www.zhangxinxu.com<\/a><br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"http:\/\/www.zhangxinxu.com\/wordpress\/?p=1087\">http:\/\/www.zhangxinxu.com\/wordpress\/?p=1087<\/a><\/p>\n<h3>\u4e00\u3001\u4fd7\u8010\u7684\u5f00\u7bc7\u8bed<\/h3>\n<p>\u5173\u4e8e\u4e0b\u62c9\u83dc\u5355\u7684\u53ef\u7528\u6027\u95ee\u9898\uff0c\u6211\u4e4b\u524d\u4e00\u76f4\u90fd\u662f\u5ffd\u7565\u7684\uff0c\u53ef\u4ee5\u8bf4\u662f\u4e0d\u77e5\u9053\uff0c\u5e38\u5e38\u4ec5\u4ec5\u6b62\u6b65\u4e8e\u773c\u524d\u7684\u6548\u679c\u4e0a\u3002\u524d\u6bb5\u65f6\u95f4\u770b\u5230\u4e86Roger\u7684&#8221;<a href=\"http:\/\/www.dingoaccess.com\/accessibility\/accessing-nav-drop-downs\/\" target=\"_blank\">Accessing Nav Drop-Downs<\/a>&#8220;\u4e00\u6587\uff0c\u5c31\u662f\u8bb2\u4e86\u4e0b\u4e0b\u62c9\u83dc\u5355\u7684\u53ef\u7528\u6027\u95ee\u9898\u3002\u540c\u65f6\uff0c\u5de7\u7684\u662f\uff0c\u6700\u8fd1\u5728\u770b\u6dd8\u5b9dUED\u7ffb\u8bd1\u7684\u300appk\u8c08JavaScript\u300b\u4e00\u4e66\uff0c\u5176\u591a\u6b21\u63d0\u5230\u4e86\u53ef\u8bbf\u95ee\u6027\u7684\u95ee\u9898\uff0c\u5c24\u5176\u5728p28~p37\u5bf9JavaScript\u53ca\u5176\u4e00\u4e9b\u53ef\u7528\u6027\u95ee\u9898\u53d1\u8868\u4e86\u81ea\u5df1\u7684\u770b\u6cd5\u3002\u5176\u4e2d\u4e3b\u8981\u7684\u89c2\u70b9\u548c\u6ce8\u610f\u4e8b\u9879\u4e0eRoger\u7684\u6587\u7ae0\u662f\u4e00\u81f4\u7684\u3002<\/p>\n<p>\u8fd9\u4e9b\u9605\u8bfb\u7684\u7ecf\u5386\u8ba9\u6211\u610f\u8bc6\u5230\u81ea\u5df1\u957f\u65f6\u95f4\u5ffd\u7565\u4e0b\u62c9\u83dc\u5355\u7684\u53ef\u8bbf\u95ee\u6027\uff0c\u4e8e\u662f\u5f00\u59cb\u7ed3\u5408\u5b9e\u9645\u60c5\u51b5\uff0c\u601d\u8003\u81ea\u5df1\u4ee5\u540e\u9700\u8981\u6ce8\u610f\u548c\u63d0\u9ad8\u7684\u5730\u65b9\u3002\u8fd9\u8ba9\u6211\u5bf9\u4e0b\u62c9\u83dc\u5355\u5b9e\u73b0\u65b9\u5f0f\u9009\u62e9\u3001\u6807\u7b7e\u7684\u4f7f\u7528\u7b49\u6709\u4e86\u66f4\u52a0\u660e\u786e\u7684\u8ba4\u8bc6\u3002\u4e0d\u592a\u6210\u719f\u7684\u601d\u8003\uff0c\u4ec5\u7528\u4e8e\u4ea4\u6d41\u3002\u518d\u5177\u4f53\u8bb2\u8ff0\u4e0b\u62c9\u83dc\u5355\u7684\u53ef\u8bbf\u95ee\u6027\u4e4b\u524d\uff0c\u5148\u7b80\u5355\u8bf4\u8bf4\u4e0b\u62c9\u83dc\u5355\u4ee5\u53ca\u4e0b\u62c9\u83dc\u5355\u7684\u5b9e\u73b0\u5427\u3002<\/p>\n<h3>\u4e8c\u3001\u5173\u4e8e\u4e0b\u62c9\u83dc\u5355\u53ca\u5176\u5b9e\u73b0<\/h3>\n<p><a target=\"_blank\" href=\"http:\/\/baike.baidu.com\/view\/1143846.htm\">\u767e\u5ea6\u767e\u79d1<\/a>\u5bf9\u201c\u4e0b\u62c9\u83dc\u5355\u201d\u4e00\u8bcd\u7684\u89e3\u91ca\u662f\uff1a\u4ee5\u6761\u5f62\u83dc\u5355\u680f\u548c\u83dc\u5355\u680f\u4e2d\u6bcf\u4e2a\u83dc\u5355\u9879\u7684\u5f39\u51fa\u83dc\u5355\u7a97\u53e3\u4e24\u90e8\u5206\u7ec4\u6210\uff0c\u4e00\u822c\u4f5c\u4e3a\u5e94\u7528\u7cfb\u7edf\u7684\u4e3b\u83dc\u5355\u4f7f\u7528\u3002\u4e0d\u8fc7\u8fd9\u6bb5\u8bdd\u5c31\u50cf\u300a\u76d7\u68a6\u7a7a\u95f4\u300b\u4e00\u6837\uff0c\u8ba9\u4eba\u5f88\u96be\u61c2\u3002\u901a\u4fd7\u70b9\u8bb2\uff0c\u5c31\u662f\u201c\u7ecf\u8fc7\/\u4f1a\u70b9\u51fb\u5c31\u4f1a\u663e\u793a\u5217\u8868\u7684\u83dc\u5355\u201d\u5c31\u53eb\u505a\u4e0b\u62c9\u83dc\u5355\u3002\u5728web\u4e0a\u975e\u5e38\u4e4b\u5e38\u89c1\uff0c\u4f8b\u5982~~\u6211\u968f\u4fbf\u6253\u5f00\u4e2a\u9875\u9762\uff0c\u554a\uff0c\u5c31\u50cf\u662f\u6211\u6d4f\u89c8\u5668\u73b0\u5728\u663e\u793a\u7684\u767e\u79d1\u7684\u9875\u9762\u7684\u53f3\u4e0a\u89d2\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u767e\u5ea6\u767e\u79d1\u53f3\u4e0a\u89d2\u4e0b\u62c9\u83dc\u5355 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/2010-09-08_204703.png\" title=\"\u767e\u5ea6\u767e\u79d1\u53f3\u4e0a\u89d2\u4e0b\u62c9\u83dc\u5355 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"alignnone\" width=\"348\" height=\"137\" \/><\/p>\n<p>\u6216\u662f\u9694\u58c1\u7684\u5fae\u535a\u9875\u9762\uff0c\u554a\uff0c\u679c\u7136\uff0c\u770b\u5de6\u4e0a\u89d2\u7684\u5e7f\u573a\u4e0b\u62c9\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u65b0\u6d6a\u5fae\u535a\u5de6\u4e0a\u89d2\u4e0b\u62c9 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/2010-09-08_205135.png\" title=\"\u65b0\u6d6a\u5fae\u535a\u5de6\u4e0a\u89d2\u4e0b\u62c9 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"alignnone\" width=\"340\" height=\"176\" \/><\/p>\n<p>\u6069\u6069\uff0c\u770b\u6765\u4e0b\u62c9\u83dc\u5355\u5c31\u50cf\u662f\u7537\u4eba\u4e00\u6837\uff0c\u6ee1\u5730\u90fd\u662f\u3002\u5c31\u4e0d\u4e00\u4e00\u4e3e\u4f8b\u4e86\uff0c\u5173\u4e8e\u4e0b\u62c9\u83dc\u5355\u7684\u5b9e\u73b0\uff0c\u90a3\u65b9\u6cd5\u53ef\u5c31\u591a\u4e86\uff0cclass\u5207\u6362\uff0c\u5c5e\u6027\u7ed1\u5b9a\uff0cjs\u5b9a\u4f4d\u7b49\uff0c\u4e0d\u540c\u7684\u9875\u9762\uff0c\u4e0d\u540c\u7684\u8bbe\u8ba1\uff0c\u4e0d\u540c\u7684\u67b6\u6784\uff0c\u5c31\u6709\u4e0d\u540c\u7684\u5b9e\u73b0\u65b9\u6cd5\u3002\u7531\u4e8e\u6bcf\u4e2a\u9879\u76ee\uff0c\u6bcf\u4e2a\u9875\u9762\u7684\u60c5\u51b5\u90fd\u4e0d\u4e00\u6837\uff0c\u6240\u4ee5\uff0c\u4e0d\u80fd\u8f7b\u6613\u7684\u4e0b\u7ed3\u8bba\uff0c\u4f60\u662f\u5927\u718a\u732b\uff0c\u662f\u56fd\u5b9d\uff0c\u5b83\u662f\u5c0f\u91ce\u732b\uff0c\u662f\u6742\u8349\u3002\u4f46\u662f\uff0c\u5c31\u53ef\u7528\u6027\u800c\u8a00\uff0c\u4e0d\u540c\u7684\u65b9\u6cd5\u4f18\u52a3\u8fd8\u662f\u6709\u6807\u51c6\u6765\u8bc4\u5224\u7684\uff0c\u8fd9\u4e2a\u5728\u540e\u9762\u4f1a\u81ea\u7136\u800c\u7136\u7684\u5c55\u793a\u3002<\/p>\n<p>\u73b0\u5728\uff0c\u4e3e\u4e2a\u5207\u6362class\u5b9e\u73b0\u4e0b\u62c9\u6548\u679c\u7684\u7b80\u5355\u4f8b\u5b50\uff0c\u5b9e\u4f8b\u83dc\u5355\u539f\u578b\u6765\u81ea<a target=\"_blank\" href=\"http:\/\/www.mtime.com\/\">Mtime\u65f6\u5149\u7f51<\/a>\uff0c<span class=\"s\">\/\/zxx:Mtime\u521b\u59cb\u4eba\u5728\u65b0\u6d6a\u5fae\u535a\u4e0a\u5f88\u6d3b\u8dc3\uff0c\u4f60\u6709\u5174\u8da3\u53ef\u4ee5follow\u4ed6\uff0c<a href=\"http:\/\/t.sina.com.cn\/n\/%E9%A9%AC%E6%97%A5%E6%8B%89\" target=\"_blank\">@\u9a6c\u65e5\u62c9<\/a>\uff0c\u4f60\u6709\u6ca1\u6709\u89c9\u5f97\u8fd9\u4e2a\u540d\u5b57\u5f88\u6709\u9050\u60f3\u7684\u7a7a\u95f4\u5462\uff1f<\/span>\uff0c\u622a\u56fe\u5982\u4e0b\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"Mtime\u65f6\u5149\u7f51\u5bfc\u822a\u4e0b\u62c9\u622a\u56fe  \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/2010-09-08_211858.jpg\" title=\"Mtime\u65f6\u5149\u7f51\u5bfc\u822a\u4e0b\u62c9\u622a\u56fe  \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"imgpad\" width=\"439\" height=\"158\" \/><\/p>\n<p>\u6b64\u5bfc\u822a\u4e0b\u62c9\u7684\u6bcf\u4e2a\u4e0b\u62c9\u5185\u5bb9\u90fd\u5df2\u7ecf\u901a\u8fc7CSS\u5b9a\u4f4d\u597d\u4e86\uff0c\u4f46\u662f\uff0c\u8003\u8651\u5230\u52a0\u8f7d\u7684\u539f\u56e0\uff0c\u5176\u4e0b\u62c9\u5185\u5bb9\u9ed8\u8ba4\u662f\u672a\u88c5\u8f7d\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u662f\u9f20\u6807\u79fb\u81f3\u5bfc\u822a\u5185\u5bb9\u4e0a\uff0c\u624d\u52a8\u6001load\u4e0b\u62c9<code>div<\/code>\u5e76\u5d4c\u5165\u5bfc\u822a<code>li<\/code>\u6807\u7b7e\u5185\u7684\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u4e0b\u62c9div append \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/2010-09-08_212603.png\" title=\"\u4e0b\u62c9div append \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"alignnone\" width=\"546\" height=\"163\" \/><\/p>\n<p>\u5f53\u7136\uff0c\u4f5c\u4e3a\u9759\u6001demo\u9875\u9762\uff0c\u6ca1\u6709\u5fc5\u8981\u52a8\u6001load\u4e0b\u62c9\u5185\u5bb9\uff0c\u6240\u4ee5\uff0cdemo\u9875\u9762\u7684\u4e0b\u62c9div\u9ed8\u8ba4\u5c31\u662f\u9690\u85cf\u4e14\u88c5\u8f7d\u597d\u7684\uff0c\u4e8e\u662f\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684class\u5207\u6362\u5b9e\u73b0\u4e0b\u62c9\u6548\u679c\u3002<br \/>\n\u9996\u5148\u662fHTML\u7ed3\u6784\uff0c\u89c1\u4e0b\u56fe\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u65f6\u5149\u7f51\u4e0b\u62c9\u83dc\u5355\u7684HTML\u7ed3\u6784 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/2010-09-08_215033.png\" title=\"\u65f6\u5149\u7f51\u4e0b\u62c9\u83dc\u5355\u7684HTML\u7ed3\u6784 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"alignnone\" width=\"531\" height=\"353\" \/><\/p>\n<p>\u6838\u5fc3CSS\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>\n.i_n_l{display:none;}\n.showtime_hover .i_n_l,.quiz_hover .i_n_l,.home_hover .i_n_l,.movie_hover .i_n_l,.tv_hover .i_n_l,.person_hover .i_n_l,.blog_hover .i_n_l,.group_hover .i_n_l{display:block;}\n<\/pre>\n<\/div>\n<p>\u53ef\u89c1\uff0c\u6211\u4eec\u53ea\u8981\u8ba9li\u6807\u7b7e\u7684class\uff0c\u4f8b\u5982\u201c\u6211\u7684\u65f6\u5149\u201d\u6240\u5728li\u6807\u7b7e\uff0c\u7531&#8221;home&#8221;\u53d8\u6210&#8221;home_hover&#8221;\u5c31\u53ef\u4ee5\u63a7\u5236\u4e0b\u62c9\u83dc\u5355\u7684\u663e\u793a\u4e0e\u9690\u85cf\u4e86\uff0c\u5f88\u7b80\u5355\u5427\uff0c\u6240\u4ee5\uff0c\u76f8\u5e94\u7684js\u4ee3\u8868\u5c31\u4f1a\u7c7b\u4f3c\u4e8e\u4e0b\u9762\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>\n&lt;script&gt;\n    var o = document.getElementById(\"navigationRegion\").getElementsByTagName(\"li\");\n    var l = o.length;\n    for(var i=0; i&lt;l; i+=1){\n        o[i].onmouseover = function(i){\n            var cl = o[i].className;\n            if(\/_on$\/.test(cl) || \/_hover$\/.test(cl)){\n                  return;\t\t  \n            }\n            o[i].className = cl + \"_hover\";  \n        }(i);\n        o[i].onmouseout = function(i){\n            return function(){\n                o[i].className = o[i].className.replace(\"_hover\", \"\");    \n            }\n        }(i);\n    }\n&lt;\/script&gt;\n<\/pre>\n<\/div>\n<p>\u7136\u540e\uff0c\u6548\u679c\u5c31\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u622a\u81eaIE6\u6d4f\u89c8\u5668\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u65f6\u5149\u7f51\u4e0b\u62c9demo\u5b9e\u73b0\u6548\u679cIE6\u4e0b\u622a\u56fe \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/2010-09-08_215838.jpg\" title=\"\u65f6\u5149\u7f51\u4e0b\u62c9demo\u5b9e\u73b0\u6548\u679cIE6\u4e0b\u622a\u56fe \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"alignnone\" width=\"369\" height=\"233\" \/><\/p>\n<p>\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a class=\"a_link\" target=\"_blank\" href=\"http:\/\/www.zhangxinxu.com\/study\/201009\/drop-down-menu-simple.html\">\u65f6\u5149\u7f51\u4e0b\u62c9\u83dc\u5355demo<\/a><\/p>\n<p>\u6069\uff0c\u4e0d\u9519\uff0c\u6548\u679c\u826f\u597d\uff0c\u6ca1\u6709\u517c\u5bb9\u6027\u95ee\u9898\uff0cjs\u4ee3\u7801\u4e5f\u7b97\u662f\u7b80\u6d01\u6613\u61c2\uff0c\u5f00\u8d77\u6765\u4f3c\u4e4e\u5927\u529f\u544a\u6210\u3002\u8981\u662f\u4ee5\u524d\u7684\u6211\uff0c\u4f30\u8ba1\u4e5f\u5c31\u4f1a\u5230\u8fd9\u91cc\u5c31\u7ed3\u675f\u4e86\uff0c\u6ca1\u6709bug\uff0c\u6d4b\u8bd5\u5de5\u7a0b\u5e08\u4e0d\u4f1a\u6765\u627e\u832c\u4e86\u3002\u4f46\u662f\uff0c\u5b9e\u9645\u4e0a\uff0c\u6b64\u5904\u4e0b\u62c9\u7684\u53ef\u8bbf\u95ee\u6027\u53ea\u80fd\u8bf4\u662f\u4e2d\u7b49\u53ca\u683c\u7684\u6c34\u5e73\u3002<span class=\"s\">\/\/zxx:\u4e0d\u8fc7\u8c8c\u4f3c\u73b0\u5728\u6574\u4e2a\u884c\u4e1a\uff08\u5373\u4f7f\u6dd8\u5b9d\u8fd9\u7c7b\u91cd\u89c6\u524d\u7aef\u7684\u516c\u53f8\uff09\u7684\u4e0b\u62c9\u83dc\u5355\u90fd\u53ea\u5b9e\u73b0\u5230\u8fd9\u4e00\u7a0b\u5ea6\uff0c\u6216\u8bb8\u5176\u4e2d\u6709\u7740\u5404\u79cd\u5404\u6837\u7684\u539f\u56e0\uff0c\u4f46\u6211\u4e2a\u4eba\u611f\u89c9\u8fd8\u662f\u6574\u4e2a\u884c\u4e1a\u7684\u6c34\u5e73\u6709\u5f85\u63d0\u9ad8\u3002<\/span><\/p>\n<p>\u4e3a\u4f55\u8bf4\u770b\u4f3c\u4e0d\u9519\u7684\u4e0b\u62c9\u83dc\u5355\u6548\u679c\u5176\u5b9e\u53ef\u7528\u6027\u4f4e\u5462\uff1f\u7ee7\u7eed\u4e0b\u6587\u3002<\/p>\n<h3>\u4e09\u3001\u4e0b\u62c9\u83dc\u5355\u53ef\u8bbf\u95ee\u6027\u95ee\u9898<\/h3>\n<p>\u9996\u5148\u56de\u7b54\u8fd9\u4e2a\u95ee\u9898\uff1a\u4ec0\u4e48\u662f\u53ef\u8bbf\u95ee\u6027\uff1f<br \/>\n\u53ef\u8bbf\u95ee\u6027\u662f\u6307\u4f60\u7684\u7f51\u9875\u5bf9\u4efb\u4f55\u4eba\u3001\u5728\u4efb\u4f55\u73af\u5883\u4e0b\u90fd\u662f\u53ef\u6301\u7eed\u8bbf\u95ee\u7684\u3002\u4f46\u662f\uff0c\u5728\u76ee\u524d\uff0c\u8981\u4f7f\u5f97\u6240\u6709\u7684\u7f51\u7ad9\u5728\u4efb\u4f55\u60c5\u51b5\u4e0b\u90fd\u4fdd\u6301\u5b8c\u7f8e\u65e0\u7f3a\u7684\u53ef\u8bbf\u95ee\u6027\uff0c\u8fd9\u6837\u7684\u8981\u6c42\u6bd4\u8981\u6c42\u8001\u677f\u5347\u804c\u8fd8\u8981\u9ad8\uff0c\u662f\u4e0d\u5b9e\u9645\u7684\uff0c\u4f46\u662f\uff0c\u5728\u6709\u9650\u7684\u8303\u56f4\u5185\uff0c\u6709\u7740\u5b9e\u9645\u610f\u4e49\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u63d0\u9ad8\u7684\u5730\u65b9\u8fd8\u662f\u5f88\u591a\u7684\u3002<\/p>\n<p>\u5e38\u89c1\u7684\u53ef\u8bbf\u95ee\u6027\u95ee\u9898\u6709\u4e0b\u9762\u4e09\u4e2a\uff1a<br \/>\n<strong>\u65e0\u811a\u672c<\/strong><br \/>\n\u8fd9\u4e2a\u4e3b\u8981\u662f\u8003\u8651\u5230\u67d0\u4e9b\u6d4f\u89c8\u5668\u4e0d\u652f\u6301JavaScript\u7684\u60c5\u51b5\u3002\u4f8b\u5982Google\u7684\u9875\u9762\u4e2d\u7ecf\u5e38\u53ef\u89c1<code>&lt;noscript&gt;<\/code>\u6807\u7b7e\uff0c\u5176\u5c31\u8003\u8651\u5230\u8fd9\u4e00\u70b9\u3002\u4f46\u662f\uff0c\u5c31\u6211\u4e2a\u4eba\u7684\u89c2\u70b9\uff0c\u5982\u679c\u60a8\u7684\u7f51\u7ad9\u4e0d\u662f\u9762\u5bf9\u4e9a\u975e\u62c9\u7f8e\u8fd9\u4e9b\u56fd\u5bb6\uff0c\u65e0\u811a\u672c\u7684\u95ee\u9898\u5176\u5b9e\u662f\u53ef\u4ee5\u5ffd\u7565\u7684\u3002\u5f53\u7136\uff0c\u67d0\u4e9b\u4eba\u5458\u6545\u610f\u7981\u7528JavaScript\u5219\u53e6\u5f53\u522b\u8bba\u3002<\/p>\n<p><strong>\u6ca1\u6709\u9f20\u6807<\/strong><br \/>\n\u8fd9\u662f\u7ecf\u5e38\u4f1a\u9047\u5230\u7684\u3002\u6709\u4e9b\u7528\u6237\u4e0d\u4f7f\u7528\u9f20\u6807\uff0c\u800c\u662f\u4f7f\u7528\u952e\u76d8\uff0c\u7406\u7531\u5404\u79cd\u5404\u6837\u3002\u4f8b\u5982\u6211\u81ea\u5df1\uff0c\u6709\u65f6\u5019\u61d2\u60f0\u5230\u5883\u754c\u7684\u65f6\u5019\uff0c\u8981\u662f\u5de6\u624b\u5df2\u7ecf\u6401\u5728\u952e\u76d8\u4e0a\uff0c\u5c31\u61d2\u5f97\u62ac\u8d77\u6211\u7684\u53f3\u624b\uff0c\u53bb\u79fb\u52a8\u70b9\u51fb\u9f20\u6807\uff0c\u591a\u9ebb\u70e6\u7d2f\u4eba\u554a\u3002\u76f4\u63a5\u5de6\u624b\u6307\u5934\u5782\u76f4\u52a8\u4e2a\u51e0\u5398\u7c73\u591a\u8f7b\u677e\u591a\u65b9\u4fbf\u554a\uff1b\u50cf\u6211\u5927\u5b66\u540c\u5b66\uff0c\u7535\u8111\u4e0d\u77e5\u51fa\u4e86\u4ec0\u4e48\u95ee\u9898\uff0c\u9f20\u6807\u90fd\u662f\u4f7f\u7528\u4e0d\u7075\uff0c\u6240\u4ee5\u4ed6\u7684\u5927\u90e8\u5206\u4e0a\u7f51\u64cd\u4f5c\u90fd\u662f\u952e\u76d8\u5b8c\u6210\u7684\uff1b\u8fd8\u6709\u4e9b\u7528\u6237\u6709\u624b\u90e8\u6b8b\u75be\uff08\u6216\u7f3a\u9677\uff09\u800c\u65e0\u6cd5\u63a7\u5236\u9f20\u6807\u505a\u51fa\u5fae\u7b11\u7684\u79fb\u52a8\uff0c\u6309\u952e\u4e3a\u4ed6\u4eec\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5f88\u597d\u7684\u5907\u9009\u65b9\u6848\uff0c\u9664\u975eJavaScript\u5f00\u53d1\u4eba\u5458\u5fd8\u8bb0\u7167\u987e\u4ed6\u4eec\u3002\u800c\u5b9e\u9645\u4e0a\uff0c\u5305\u62ec\u6211\u5728\u5185\u7684\u8bb8\u591a\u524d\u7aef\u5f00\u53d1\u5de5\u7a0b\u5e08\uff0c\u6216\u662f\u7701\u529f\u592b\uff0c\u6216\u662f\u5176\u4ed6\u4ec0\u4e48\u539f\u56e0\uff0c\u800c\u5c06\u8fd9\u90e8\u5206\u4eba\u7fa4\u5f53\u4f5c\u6210\u5e74\u7684\u5305\u88f9\uff0c\u90fd\u6254\u6389\u4e86\u3002<\/p>\n<p><strong>\u5c4f\u5e55\u9605\u8bfb\u5668<\/strong><br 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target=\"_blank\" href=\"http:\/\/cdc.tencent.com\/?p=2831\">\u95ed\u4e0a\u773c\u775b\u7528QQ \u2013 \u76f2\u4eba\u7528\u6237\u63a2\u8bbf\u5b9e\u5f55<\/a>\u201d\u8fd9\u7bc7\u6587\u7ae0\u3002\u4f01\u9e45\u516c\u53f8\u5c31\u662f\u4f01\u9e45\u516c\u53f8\uff0c\u6709\u94b1\u6709\u4eba\u6709\u8bbf\u8c08\uff0c\u8fd9\u6b21\u8bbf\u8c08\u5b9e\u5f55\u5bf9\u4e8e\u50cf\u6211\u8fd9\u6837\u6ca1\u6709\u673a\u4f1a\u4eb2\u5386\u76f2\u4eba\u7528\u6237\u7684\u5f00\u53d1\u4eba\u5458\u6765\u8bb2\u662f\u975e\u5e38\u5b9d\u8d35\u7684\u4e00\u624b\u8d44\u6599\uff0c\u8ba9\u6211\u610f\u8bc6\u5230\uff0c\u76f2\u4eba\u7528\u6237\u4e5f\u6709\u4e9b\u4ed6\u4eec\u7cbe\u5f69\u7684\u4e16\u754c\uff0c\u4ed6\u8ddf\u6211\u4eec\u8fd9\u4e9b\u89c6\u529b\u826f\u597d\u7684\u4eba\u4e00\u6837\uff0c\u4e5f\u662f\u53ef\u4ee5\u5f88\u597d\u7684\u4f53\u9a8c\u5230web\u7ed9\u6211\u4eec\u751f\u6d3b\u5e26\u6765\u7684\u5feb\u4e50\u7684\u3002<\/p>\n<p><span class=\"s\">\/\/zxx:\u4e0b\u9762\u8fd9\u6bb5\u6458\u81ea\u201c<a target=\"_blank\" href=\"http:\/\/cdc.tencent.com\/?p=2831\">\u95ed\u4e0a\u773c\u775b\u7528QQ \u2013 \u76f2\u4eba\u7528\u6237\u63a2\u8bbf\u5b9e\u5f55<\/a>\u201d\u4e00\u6587\u3002<\/span><\/p>\n<blockquote><p>\u76f2\u4eba\u7528\u6237\u6240\u6709\u7684\u7535\u8111\u64cd\u4f5c\u90fd\u4f9d\u8d56\u4e8e\u8bfb\u5c4f\u8f6f\u4ef6\u548c\u952e\u76d8\u6765\u5b8c\u6210\u3002\u8fd9\u4e09\u4f4d\u7528\u6237\u73b0\u5728\u4f7f\u7528\u7684\u90fd\u662f\u6c38\u5fb7\u8bfb\u5c4f\u8f6f\u4ef6\uff0c\u5b83\u5b89\u88c5\u540e\u5373\u5728\u540e\u53f0\u8fd0\u884c\uff0c\u628a\u666e\u901a\u7684\u64cd\u4f5c\u7cfb\u7edf\u53d8\u6210\u4e86\u5e26\u8bed\u97f3\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\u76f2\u4eba\u670b\u53cb\u4f9d\u9760tab\u952e\uff0c\u65b9\u5411\u952e\u548c\u90e8\u5206\u5feb\u6377\u952e\u6765\u8c03\u6574\u76ee\u524d\u5149\u6807\u7684\u6240\u5728\u4f4d\u7f6e\uff0c\u800c\u6bcf\u6309\u4e00\u6b21\u952e\u76d8\uff0c\u6216\u5c4f\u5e55\u4e0a\u51fa\u73b0\u65b0\u7684\u5185\u5bb9\uff0c\u6216\u53ef\u64cd\u4f5c\u754c\u9762\u4e0a\u72b6\u6001\u51fa\u73b0\u4efb\u4f55\u53d8\u5316\uff0c\u7cfb\u7edf\u90fd\u4f1a\u6709\u8bed\u97f3\u63d0\u793a\uff0c\u8fd9\u6837\u76f2\u4eba\u670b\u53cb\u4e5f\u53ef\u4ee5\u50cf\u666e\u901a\u4eba\u4e00\u6837\u5bf9\u7535\u8111\u8fdb\u884c\u64cd\u4f5c\u4e86\u3002\u7531\u4e8e\u591a\u5e74\u7684\u8bad\u7ec3\uff0c\u76f2\u4eba\u6240\u7528\u7684\u8bed\u97f3\u5e93\u7684\u8bed\u901f\u90fd\u975e\u5e38\u5feb\uff0c\u666e\u901a\u4eba\u96be\u4ee5\u8bc6\u522b\u3002\u987a\u5e26\u8bf4\u4e00\u53e5\uff0c\u76ee\u524d\u56fd\u5185\u7684\u8bfb\u5c4f\u8f6f\u4ef6\u90fd\u4e0d\u4fbf\u5b9c\uff0c\u5982\u6c38\u5fb7\u662f\u57281200\u5de6\u53f3\uff0c\u800c\u4e00\u4e2a\u76f2\u4eba\u6309\u6469\u5e08\u7684\u6708\u6536\u5165\u4e5f\u5c311\u30012\u5343\u5427\uff0c\u95ee\u53ca\u4ed6\u4eec\u662f\u5426\u4f1a\u89c9\u5f97\u8fd9\u4e2a\u8f6f\u4ef6\u592a\u8d35\uff0c\u8001\u677f\u5a18\u7b11\u4e86\u7b11\u8bf4\uff1a\u201c\u6211\u89c9\u5f97\u503c\uff01\u201d\u7535\u8111\u548c\u7f51\u7edc\u7ed9\u76f2\u4eba\u5e26\u6765\u4e86\u5168\u65b0\u7684\u751f\u6d3b\u3002<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\u76f2\u4eba\u7528\u6237\u4f7f\u7528\u7535\u8111 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/blindman.jpg\" title=\"\u76f2\u4eba\u7528\u6237\u4f7f\u7528\u7535\u8111 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"imgpad mt10 mb5\" width=\"550\" height=\"310\" \/><br \/>\n\u56fe\u7247\u6765\u81ea\u817e\u8bafCDC  \u5c0f\u9ec4\u548c\u4ed6\u7684\u7535\u8111\uff08\u53f3\u8fb9\u7684\u6570\u5b57\u952e\u76d8\u5bf9\u4ed6\u4eec\u5f88\u91cd\u8981\uff09<\/p>\n<p>\u4fe1\u606f\u65e0\u969c\u788d\u662f\u6211\u4eec\u5e94\u5c3d\u7684\u516c\u76ca\u8d23\u4efb\uff0c\u800c\u6211\u56fd\u662f\u4e16\u754c\u4e0a\u76f2\u4eba\u6700\u591a\u7684\u56fd\u5bb6\uff0c\u6839\u636e\u4e2d\u56fd\u6b8b\u8054\u6700\u8fd1\u4e00\u6b21\u516c\u5e03\u7684\u6570\u636e\uff08\u57282006\u5e74\u53d1\u5e03\uff09\uff0c\u89c6\u969c\u60a3\u8005\u7684\u6570\u91cf\u57281300\u4e07\u5de6\u53f3\uff0c\u82e5\u6309\u7167\u76ee\u524d\u7684\u901f\u5ea6\u589e\u957f\u4e0b\u53bb\uff0c\u9884\u8ba1\u57282020\u5e74\u8fd9\u4e00\u4eba\u6570\u5c06\u8fbe\u52305000\u4e07\u5de6\u53f3\u3002\u8981\u4f7f\u76f2\u4eba\u670b\u53cb\u80fd\u591f\u66f4\u597d\u7684\u4f7f\u7528\u7535\u8111\uff0c\u7545\u4eab\u7f51\u7edc\u751f\u6d3b\uff0c\u6211\u4eec\u9700\u8981\u505a\u7684\u4e8b\u60c5\u8fd8\u6709\u5f88\u591a\u3002<\/p><\/blockquote>\n<p>\u4ece\u4e0a\u9762\u4e09\u70b9\u53ef\u4ee5\u770b\u51fa\uff0c\u5bf9\u952e\u76d8\u7684\u652f\u6301\u662f\u63d0\u9ad8\u9875\u9762\u53ef\u8bbf\u95ee\u6027\u7684\u6700\u91cd\u8981\u7684\u56e0\u7d20\u3002\u6240\u4ee5\uff0c\u6211\u4eec\u518d\u5236\u4f5c\u9875\u9762\u7684\u65f6\u5019\uff0c\u8fd8\u9700\u8981\u591a\u591a\u8003\u8651\u5230\u952e\u76d8\u4e8b\u4ef6\uff0c\u5c24\u5176\u50cf\u4e0a\u4e0b\u5de6\u53f3\u952e\uff0cTAB\u952e\u548c\u56de\u8f66\u952e\u3002<\/p>\n<h3>\u56db\u3001\u56fd\u5916\u652f\u6301\u952e\u76d8\u4e8b\u4ef6\u83dc\u5355<\/h3>\n<p>\u56fd\u5916\u662f\u6709\u4e0d\u5c11\u952e\u76d8\u652f\u6301\u4e0b\u62c9\u83dc\u5355\u7684\u4f8b\u5b50\u7684\uff0c\u4f8b\u5982\uff1a<br \/>\nmozilla\u7684<a target=\"_blank\" href=\"http:\/\/www.mozilla.com\/en-US\/\">\u5b98\u65b9\u9996\u9875<\/a>\u3002<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"Mozilla\u5b98\u65b9\u9996\u9875\u4e0b\u62c9\u952e\u76d8\u64cd\u4f5c \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/2010-09-08_231208.png\" title=\"Mozilla\u5b98\u65b9\u9996\u9875\u4e0b\u62c9\u952e\u76d8\u64cd\u4f5c \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"alignnone\" width=\"485\" height=\"178\" \/><br \/>\n\u5f53\u6211\u4eec\u4f7f\u7528TAB\u952e\u8ba9\u5bfc\u822a\u9879\u83b7\u53d6\u7126\u70b9\u540e\uff08IE\u548cFirefox\u6d4f\u89c8\u5668\u4f1a\u6709\u865a\u6846\uff09\uff0c\u6309\u4e0b\u2190\u952e\uff0c\u6216\u662f\u2192\u952e\uff0c\u6216\u662f\u2193\u952e\uff0c\u5982\u679c\u6709\u5bfc\u822a\u9879\u7684\u8bdd\uff0c\u5c31\u4f1a\u663e\u793a\u4e0b\u62c9\u5185\u5bb9\u7684\u3002<\/p>\n<p>\u53c8\u5982yahoo\u5f00\u53d1\u793a\u4f8b\u7684\u8fd9\u4e2a<a target=\"_blank\" href=\"http:\/\/developer.yahoo.com\/yui\/examples\/menu\/topnavfrommarkup_source.html\">\u4e0b\u62c9\u83dc\u5355<\/a>\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"yahoo\u5f00\u53d1\u4e0b\u62c9\u83dc\u5355\u622a\u56fe \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/2010-09-08_232607.png\" title=\"yahoo\u5f00\u53d1\u4e0b\u62c9\u83dc\u5355\u622a\u56fe \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"alignnone\" width=\"415\" height=\"252\" \/><\/p>\n<p>\u4e0eMozilla\u9996\u9875\u4e0b\u62c9\u83dc\u5355\u76f8\u6bd4\uff0c\u8fd9\u91cc\u529f\u80fd\u66f4\u591a\u4e86\u4e9b\uff0c\u652f\u6301\u4e8c\u7ea7\u83dc\u5355\uff0c\u7531\u4e8e\u5bfc\u822a\u975e\u94fe\u63a5\uff0c\u6240\u4ee5\u8fd8\u652f\u6301\u56de\u8f66\u952e\u663e\u793a\u4e0b\u62c9\u83dc\u5355\u3002<\/p>\n<p>\u4e0a\u8ff0\u4e24\u4e2a\u5b9e\u4f8b\u90fd\u662f\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u652f\u6301\u4e86\u952e\u76d8\u4e8b\u4ef6\u7684\u4e0b\u62c9\u83dc\u5355\u7684\u793a\u4f8b\u3002\u4f46\u662f\uff0c\u8fd9\u91cc\u6211\u8981\u91cd\u91cd\u5730\u8f6c\u6298\uff01\u8fd9\u91cc\u7684\u952e\u76d8\u652f\u6301\u7684\u5b9e\u9645\u5e94\u7528\u4ef7\u503c\u662f\u591a\u5c11\u5462\uff1f\u5f00\u53d1\u7684\u53ef\u884c\u6027\u53c8\u662f\u591a\u5927\u5462\uff1f\u6211\u7684\u7ed3\u8bba\u662f\uff1a\u5b9e\u9645\u5e94\u7528\u4ef7\u503c\u4f4e\uff0c\u5f00\u53d1\u7684\u53ef\u884c\u6027\u4f4e\u3002<\/p>\n<p>\u9996\u5148\u662f\u4f7f\u7528\u4ef7\u503c\uff0c\u901a\u8fc7\u79fb\u52a8\u65b9\u5411\u952e\u663e\u793a\u4e0b\u62c9\u83dc\u5355\uff0c\u5c31\u4e2d\u56fd\u884c\u60c5\u800c\u8a00\uff0c\u5c31\u6570\u5341\u5e74\u6765\u4e2d\u56fd\u7f51\u6c11\u7684\u4f7f\u7528\u4e60\u60ef\u800c\u8a00\uff0c\u5c31\u4e2d\u56fd\u76ee\u524d\u524d\u7aef\u5bf9\u65b9\u5411\u952e\u7684\u652f\u6301\u60c5\u51b5\u6765\u770b\uff0c\u5373\u4f7f\u4f60\u5455\u5fc3\u6ca5\u8840\u505a\u4e86\u4e2a\u53ef\u4ee5\u901a\u8fc7\u65b9\u5411\u952e\u63a7\u5236\u4e0b\u62c9\u663e\u793a\u7684\u5bfc\u822a\u83dc\u5355\uff0c\u518d\u5373\u4f7f\u4f60\u662d\u793a\u5929\u4e0b\u6b64\u5bfc\u822a\u53ef\u65b9\u5411\u952e\u64cd\u4f5c\uff0c\u6709\u51e0\u4e2a\u4eba\u9e1f\u4f60\u7684\u8d26\u5462\uff1f\u6240\u4ee5\u6211\u8bf4\uff0c\u5728\u4e2d\u56fd\uff0c\u5728\u76ee\u524d\uff0c\u65b9\u5411\u952e\u7684\u53ef\u7528\u6027\u867d\u7136\u770b\u4e0a\u53bb\u4e0d\u9519\uff0c\u5b9e\u9645\u4e0a\u6ca1\u6709\u591a\u5927\u4ef7\u503c\u3002<br \/>\n\u5176\u6b21\u662f\u5f00\u53d1\u7684\u53ef\u884c\u6027\uff0c\u8981\u77e5\u9053\uff0c\u5927\u90e8\u5206\u7684\u516c\u53f8\u7684\u8d44\u6e90\u4eba\u529b\u6709\u9650\uff0c\u800c\u4e14\u5f88\u591a\u4eba\u80fd\u529b\u6709\u9650\uff0c\u4f60\u8bf4\uff0c\u82b1\u5de8\u5927\u7684\u4ee3\u7801\u6210\u672c\u641e\u4e2a\u53ef\u7528\u6027\u5f88\u597d\uff08\u4f46\u53d7\u4f17\u5f88\u5c0f\u7684\uff09\u7684\u4e0b\u62c9\u83dc\u5355\uff0c\u6709\u5fc5\u8981\u5417\uff1f\u53ef\u80fd\u5417\uff1f\u4f60\u4f1a\u5417\uff1f<\/p>\n<p>\u6240\u4ee5\u8bf4\uff0c\u4e0a\u9762yahoo\u5f00\u53d1\u548cMozilla\u9996\u9875\u7684\u4e0b\u62c9\u7684\u952e\u76d8\u65b9\u6cd5\u662f\u6ca1\u6709\u4efb\u4f55\u5b9e\u9645\u5e94\u7528\u4ef7\u503c\u7684\uff0c\u5176\u610f\u4e49\u4ec5\u5728\u4e8e\u5b66\u4e60\u3001\u63d0\u9ad8JavaScript\u6c34\u5e73\uff0c\u5c24\u5176\u5728\u63a7\u5236\u952e\u76d8\u4e8b\u4ef6\u4e0a\u3002<\/p>\n<p>\u60a8\u53ef\u80fd\u4f1a\u7591\u95ee\uff0c\u7167\u6211\u7684\u7ed3\u8bba\uff0c\u6240\u8c13\u201c\u4e0b\u62c9\u83dc\u5355\u53ef\u8bbf\u95ee\u6027\u201d\u53ea\u662f\u4e2a\u7a7a\u6d1e\u7684\u7406\u8bba\uff0c\u6ca1\u6709\u5b9e\u9645\u4ef7\u503c\u561b\u3002\u54e6\uff0c\u5176\u5b9e\u4e0d\u7136\uff0c\u6211\u4eec\u5176\u5b9e\u53ef\u4ee5\u627e\u5230\u5373\u6709\u5b9e\u9645\u5e94\u7528\u4ef7\u503c\uff0c\u540c\u65f6\u53c8\u5f00\u53d1\u7b80\u5355\u5e38\u7528\uff0c\u53c8\u80fd\u63d0\u9ad8\u9875\u9762\u952e\u76d8\u53ef\u7528\u6027\u7684\u65b9\u6cd5\u7684\u3002\u5176\u5173\u952e\u5c31\u662f<code>focus<\/code>\u4e8b\u4ef6\u3002\u4f5c\u4e3a\u952e\u76d8\u7528\u6237\uff0c\u6700\u5e38\u7528\u7684\u662f\u54ea\u4e2a\u952e\uff0c\u4e00\u4e2a\u662fEnter\u56de\u8f66\u952e\uff0c\u53e6\u5916\u4e00\u4e2a\u5c31\u662fTab\u7126\u70b9\u5207\u6362\u952e\u3002Tab\u952e\u53ef\u4ee5\u8ba9\u9875\u9762\u4e0a\u7684a\u6807\u7b7e\u4ee5\u53ca\u8868\u5355\u5143\u7d20(<code>button<\/code>, <code>input<\/code>)\u4f9d\u6b21\u83b7\u53d6\u7126\u70b9(\u5982\u679c\u6ca1\u6709\u8bbe\u7f6e<code>tabindex<\/code>\u5c5e\u6027\u7684\u8bdd)\uff0c\u5f53Tab\u952e\u5207\u6362\u5230\u67d0\u4e2a\u5143\u7d20\u65f6\uff0c\u6b64\u5143\u7d20\u5176\u5b9e\u5df2\u7ecf\u76f8\u5e94\u4e86onfocus\u65b9\u6cd5\uff08\u5927\u90e8\u5206\u60c5\u51b5\u4e0b\u672a\u5b9a\u4e49\u65b9\u6cd5\uff09\uff0c\u6b64\u65f6\u5982\u679c\u6309\u4e0bEnter\u56de\u8f66\u952e\uff0c\u5176\u5b9e\u76f8\u5bf9\u4e8e\u89e6\u53d1\u4e86onclick\u65b9\u6cd5\uff0c\u5982\u679ca\u6807\u7b7e\u6709\u94fe\u63a5\u7684\u8bdd\uff0c\u4f1a\u6253\u5f00\u94fe\u63a5\u7684\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u6211\u4eec\u53ef\u4ee5\u629b\u5f00\u70e6\u4eba\u7684\u65b9\u5411\u952e\uff0c\u800c\u4e13\u6ce8\u4e8eTab\u952e\uff0c\u4ee5\u53caTab\u5207\u6362\u89e6\u53d1\u7684<code>focus<\/code>\u65b9\u6cd5\u3002\u6211\u4eec\u518d\u6dfb\u52a0\u4e00\u4e2a\u8ba9\u83dc\u5355\u83b7\u53d6\u7126\u70b9\u7684\u663e\u793a\u4e0b\u62c9\u7684\u65b9\u6cd5\uff0c\u5176\u4e0d\u662f\u5927\u5927\u63d0\u9ad8\u4e86\u9875\u9762\u7684\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u3002\u800c\u4e14<code>onfocus<\/code>\u65b9\u6cd5\u672c\u8eab\u4e0e\u952e\u76d8\u65e0\u5173\uff0c\u6211\u4eec\u53ea\u9700\u8981\u4e13\u6ce8\u4e8e\u4e8b\u4ef6\u672c\u8eab\uff0c\u800c\u5ffd\u7565\u952e\u76d8\uff0c\u6240\u4ee5\u5f00\u53d1\u6210\u672c\u662f\u4f4e\u7684\uff0c\u975e\u5e38\u53ef\u884c\u7684\u3002<\/p>\n<p>\u4e0b\u9762\uff0c\u5c31\u4ee5mtime\u65f6\u5149\u7f51\u7684\u4e0b\u62c9\u4e3a\u4f8b\uff0c\u6dfb\u52a0Tab\u952e\u7684\u4e0b\u62c9\u65b9\u6cd5\uff08\u5176\u5b9e\u662f<code>onfocus<\/code>\u65b9\u6cd5\uff09\uff0c\u770b\u5982\u679c\u901a\u8fc7\u6dfb\u52a0\u51e0\u884c\u989d\u5916\u7684\u4ee3\u7801\uff0c\u6765\u5927\u5927\u63d0\u9ad8\u9875\u9762\u7684\u53ef\u8bbf\u95ee\u6027\u7684\u3002<\/p>\n<h3>\u4e94\u3001\u7ed9\u83dc\u5355\u6dfb\u52a0focus\u4e8b\u4ef6\u589e\u52a0\u952e\u76d8\u53ef\u7528\u6027<\/h3>\n<p>\u4ec0\u4e48\u5143\u7d20\u652f\u6301<code>focus<\/code>\u4e8b\u4ef6\u5462\uff0c\u636e\u6211\u6240\u77e5\u4e3a<code>a<\/code>\u6807\u7b7e\uff0c\u4ee5\u53ca\u8868\u5355\u5143\u7d20\u3002\u6240\u4ee5\uff0c\u8fd8\u662fMtime\u65f6\u5149\u7f51\u7684\u4f8b\u5b50\uff0c\u6211\u4eec\u8981\u5728\u4e0b\u56fe\u6240\u6807\u793a\u4f4d\u7f6e\u7684a\u6807\u7b7e\u4e0a\u6dfb\u52a0<code>focus<\/code>\u65b9\u6cd5\uff0c\u8ba9\u5176\u83b7\u53d6\u7126\u70b9\u65f6\u4e5f\u80fd\u663e\u793a\u4e0b\u62c9\u83dc\u5355\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"a\u6807\u7b7e\u6dfb\u52a0focus\u65b9\u6cd5 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/2010-09-09_193758.png\" title=\"a\u6807\u7b7e\u6dfb\u52a0focus\u65b9\u6cd5 \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"alignnone\" width=\"540\" height=\"124\" \/><\/p>\n<p>\u7531\u4e8e\u9f20\u6807\u7ecf\u8fc7\u4e5f\u5b9e\u73b0\u540c\u6837\u7684\u4e0b\u62c9\u6548\u679c\uff0c\u6240\u4ee5\uff0c\u6211\u4eec\u9700\u8981\u5c06\u663e\u793a\u4e0b\u62c9\u83dc\u5355\u7684\u65b9\u6cd5\u63d0\u51fa\u6765\uff0c\u4e00\u756a\u5904\u7406\u540e\uff0cjs\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>\n&lt;script>\n    var o = document.getElementById(\"navigationRegion\").getElementsByTagName(\"li\");\n    var l = o.length, cache;\n\t\n    var menuTaga = function(obj){\n        \/\/\u83b7\u53d6a\u6807\u7b7eDOM\u5bf9\u8c61\n        return obj.getElementsByTagName(\"a\")[0];\n    }, menuDown = function(obj){\n        var cl = obj.className;\n        if(\/_on$\/.test(cl) || \/_hover$\/.test(cl)){\n            return;          \n        }\n        obj.className = obj.className + \"_hover\"; \n    }, menuUp = function(obj){\n        obj.className = obj.className.replace(\"_hover\", \"\");\n    }, menuCache = function(obj){\n        if(cache){\n            menuUp(cache);    \n        }\n        cache = obj;\n    }, menuEvent = function(obj){\n        obj.onmouseover = function(){\n            menuCache(this);\n            return menuDown(this);\n        };\n        obj.onmouseout = function(){\n            return menuUp(this);\n        };\n        <span style=\"color:green;\">menuTaga(obj).onfocus = function(){\n            menuCache(obj);\n            return menuDown(obj);\n        };<\/span>\n    };\n    for(var i=0; i&lt;l; i+=1){\n        menuEvent(o[i]);\n    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title=\"\u6dfb\u52a0\u952e\u76d8\u53ef\u7528\u6027\u7684\u4e0b\u62c9\u83dc\u5355\u6548\u679c \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"alignnone\" width=\"454\" height=\"208\" \/><\/p>\n<p>\u8fd9\u91cc\u53ea\u770b\u56fe\u662f\u4f53\u4f1a\u4e0d\u51fa\u8fd9\u91cc\u53ef\u8bbf\u95ee\u6027\u662f\u5982\u4f55\u5207\u5b9e\u63d0\u9ad8\u7684\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a target=\"_blank\" class=\"a_link\" href=\"http:\/\/www.zhangxinxu.com\/study\/201009\/drop-down-menu-accessible.html\">Tab\u952e\u53ef\u8bbf\u95ee\u7684\u4e0b\u62c9\u83dc\u5355demo<\/a><\/p>\n<p>\u65e0\u8bba\u662fFirefox\u6d4f\u89c8\u5668\u8fd8\u662fIE\u6d4f\u89c8\u5668\uff0c\u4e0d\u505c\u7684\u5207\u6362Tab\u5207\u6362\u952e\uff0c\u5f53\u5bfc\u822a\u4e2d\u7684<code>a<\/code>\u6807\u7b7e\u83b7\u53d6\u7126\u70b9\u65f6\uff08\u51fa\u73b0\u865a\u6846\uff0cChrome\u571f\u6a59\u8272\u6846\uff0cSafari\u84dd\u6846\uff09\uff08\u53ef\u89c1<code>outline<\/code>\u662f\u53ef\u8bbf\u95ee\u6027\u91cc\u9762\u5f88\u91cd\u8981\u7684\u4e1c\u897f\uff0c\u6ca1\u4e8b\u5c31\u8bbe\u7f6e<code>outline:none<\/code>\u7684\u4eba\u90fd\u662f\u4e0d\u660e\u771f\u76f8\u7684\u76f2\u4ece\u8005\uff09\uff0c\u5c31\u4f1a\u51fa\u73b0\u4e0b\u62c9\u83dc\u5355\u3002\u6b64\u65f6\u4e0b\u62c9\u83dc\u5355\u4e2d\u7684\u5217\u8868\u9879\u4e5f\u53ef\u4ee5\u901a\u8fc7Tab\u952e\u83b7\u53d6\uff08\u5982\u679c\u4e0b\u62c9\u83dc\u5355\u4e0d\u663e\u793a\uff0c\u83dc\u5355\u5217\u8868\u662f\u65e0\u6cd5\u901a\u8fc7Tab\u952e\u8bbf\u95ee\u7684\uff09\u3002<\/p>\n<p>\u4e8e\u662f\uff0c\u5bf9\u4e8e\u90a3\u4e9b\u65e0\u6cd5\u6216\u4e0d\u60f3\u4f7f\u7528\u9f20\u6807\u7684\u7528\u6237\u800c\u8a00\uff0c\u8fd9\u91cc\u5bfc\u822a\u7684\u53ef\u8bbf\u95ee\u6027\u663e\u7136\u66f4\u9ad8\u4e00\u7b79\uff0c\u56e0\u4e3a\uff0c\u4ed6\u4eec\u53ef\u4ee5\u8f7b\u677e\u4f7f\u7528\u952e\u76d8\u8bbf\u95ee\u5bfc\u822a\u91cc\u9762\u7684\u6bcf\u4e00\u9879\u5185\u5bb9\uff0cTab\u5207\u6362\uff0c\u56de\u8f66\u952e\u8bbf\u95ee\u3002<\/p>\n<p>\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u5bf9\u4e8eSafari\u6d4f\u89c8\u5668\u7528\u6237\uff0c\u9ed8\u8ba4Tab\u5207\u6362\u5143\u7d20\u662f\u4e0d\u9ad8\u4eae\u7684\uff0c\u60a8\u9700\u8981\u5728\u504f\u597d\u8bbe\u7f6e\u91cc\u52fe\u9009\u6b64\u9879\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"Safari\u6d4f\u89c8\u5668\u8bbe\u7f6eTab\u5207\u6362\u5143\u7d20\u9ad8\u4eae \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201009\/2010-09-09_195433.png\" title=\"Safari\u6d4f\u89c8\u5668\u8bbe\u7f6eTab\u5207\u6362\u5143\u7d20\u9ad8\u4eae \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" class=\"alignnone\" width=\"476\" height=\"321\" 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reset\u4e2d\u7684<code>outline:0;<\/code>\uff0c\u75db\u75db\u5feb\u5feb\uff0c\u8212\u8212\u670d\u670d\u5730\u5220\u6389\u3002<br \/>\n<strong>\u5176\u6b21<\/strong>\uff0c\u51e1\u4e8b\u6d89\u53ca\u5230\u4e8b\u4ef6\u7684\u5143\u7d20\uff0c\u4f8b\u5982\u6309\u94ae\uff0c\u9009\u9879\u5361\u7b49\u3002\u90fd\u5fc5\u987b\u4f7f\u7528\uff08\u6216\u5305\u542b\uff09<code>a<\/code>\u6807\u7b7e\u6216\u662f\u8868\u5355\u5143\u7d20\uff08\u5982<code>button<\/code>\uff09\u3002\u8fd9\u4e0d\u96be\u7406\u89e3\uff0c\u5c31\u62ff\u672c\u6587\u65f6\u5149\u7f51\u5bfc\u822a\u4e3e\u4f8b\uff0c\u5b9e\u9645\u4e0a\u5bfc\u822a\u4e2d\u7684a\u6807\u7b7e\u53bb\u6389\uff0c\u540c\u6837\u7684\u811a\u672c\uff0c\u5df2\u7ecf\u53ef\u4ee5\u5b9e\u73b0\u4e0b\u62c9\u83dc\u5355\u7684\u6548\u679c\u4e86\u3002\u6216\u8bb8\u6709\u4eba\u53cd\u800c\u4f1a\u8ba4\u4e3a\u81ea\u5df1\u4ec5\u4ec5\u4f7f\u7528\u4e86<code>ul<\/code>, <code>li<\/code>\u6807\u7b7e\u5c31\u5b9e\u73b0\u4e0b\u62c9\u83dc\u5355\u6548\u679c\u6cbe\u6cbe\u81ea\u559c\uff0c\u8ba4\u4e3a\u81ea\u5df1\u53bb\u6389\u4e86\u8363\u8a89\u7684a\u6807\u7b7e\uff0cHTML\u4ee3\u7801\u591f\u7b80\u6d01\uff0c\u8fd9\u5c31\u8ddf\u300a\u5ab3\u5987\u7684\u7f8e\u597d\u65f6\u4ee3\u300b\u91cc\u9762\u7684\u6bdb\u5cf0\u4e00\u6837\uff0c\u5bb6\u91cc\u8fd9\u4e2a\u6e29\u67d4\u8d24\u60e0\u6f02\u4eae\u52e4\u52b3\u7684\u8001\u5a46\u4e0d\u8981\uff0c\u8dd1\u53bb\u6cbe\u60f9\u90a3\u4e2a\u4ec0\u4e48\u9f99\u747e\uff0c\u4e0d\u8981\u662f\u770b\u5916\u8868\u98ce\u9a9a\uff0c\u770b\u77e5\u9053\u5185\u6db5\u624d\u884c\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u6211\u8981\u770b\u5230\u53ea\u8981<code>ul<\/code>, <code>li<\/code>\u6807\u7b7e\u7684\u5bfc\u822a\u89c9\u5f97\u82d7\u6761\u6027\u611f\uff0c\u5b9e\u9645\u4e0a\u53ea\u662f\u4e2a\u82b1\u82b1\u74f6\u5b50\uff0c\u91cc\u9762\u9700\u8981\u6709\u70b9\u5185\u6db5\u7684\u4e1c\u897f\u2014\u2014<code>a<\/code>\u6807\u7b7e\u3002<code>a<\/code>\u6807\u7b7e\u672c\u8eab\u7684\u5b58\u5728\u5c31\u662f\u63d0\u9ad8\u7684\u9875\u9762\u7684\u53ef\u8bbf\u95ee\u6027\u4e86\u3002<\/p>\n<p>\u6240\u4ee5\u5462\uff0c\u90a3\u4e9b\u81ea\u4ee5\u4e3a\u4ee3\u7801\u7cbe\u7b80\u3001\u6216\u662f\u81ea\u8ba4\u4e3a<code>a<\/code>\u6807\u7b7e\u865a\u6846\u4e0d\u597d\u770b\u800c\u4f7f\u7528\u7c7b\u4f3c<code>span<\/code>\u6807\u7b7e\u4ee3\u66ff\u7684\u505a\u6cd5\uff0c\u90fd\u662f\u4e1a\u4f59\u7684\uff0c\u662f\u53ef\u4ee5\u8f7b\u677e\u6539\u8fdb\u7684\u3002<\/p>\n<p><strong>\u7136\u540e<\/strong>\uff0c\u4e0d\u8981\u81ea\u4ee5\u4e3a\u7684\u4e0d\u8981\u81ea\u4ee5\u4e3a\u8fb9\u7f18\u5904\u7406\u540e\u7684\u6587\u5b57\u4f3c\u4e4e\u66f4\u597d\u770b\uff0c\u5c31\u628a\u6309\u94ae\uff0c\u9009\u9879\u5361\u7684\u6587\u5b57\u7528\u56fe\u7247\u4ee3\u66ff\uff0c\u8fde\u6587\u5b57\u4e5f\u4e0d\u7559\u4e24\u4e2a\u3002\u4f60\u8bf4\u5c4f\u5e55\u9605\u8bfb\u5668\u8ba4\u8bc6\u56fe\u7247\u5417\uff0c\u8fd8\u6709\uff0c\u4f60\u5c31\u8fd9\u4e48\u559c\u6b22\u6ca1\u4e8b\u6765\u4e24\u4e2a\u56fe\u7247\u94fe\u63a5\u8bf7\u6c42\u6765\u8650\u5f85\u670d\u52a1\u5668\u5417\uff1f\u6240\u4ee5\uff0c\u5c11\u7528\u56fe\u7247\u4ee3\u66ff\u6587\u5b57\uff0c\u5373\u4f7f\u8981\u4ee3\u66ff\uff0c\u4e5f\u8981\u628a\u6587\u5b57\u85cf\u5728\u540e\u9762\uff0c\u6ce8\u610f\u662f\u85cf\u5728\u540e\u9762\uff0c\u5c31\u662f\u56fe\u7247\u4e0d\u663e\u793a\u6587\u5b57\u5c31\u663e\u793a\uff0c\u800c\u4e0d\u662f\u9690\u85cf\u6389\u3002<\/p>\n<p><strong>\u6700\u540e<\/strong>\uff0c\u603b\u7ed3\u4e0b\uff0c\u5c31\u662f<code>outline<\/code>\uff0c<code>a<\/code>\u6807\u7b7e\uff0c\u6587\u5b57\u3002\u5982\u679c\u60a8\u60f3\u505a\u771f\u6b63\u4f18\u79c0\u7684\u7f51\u7ad9\uff0c\u52a0\u4e00\u6761\uff0c\u952e\u76d8\u54cd\u5e94\u4e8b\u4ef6\u3002<\/p>\n<h3>\u4e03\u3001\u7ed3\u8bed\u52a0\u300a\u76d7\u68a6\u7a7a\u95f4\u300b\u7535\u5f71\u4e4b\u65c5<\/h3>\n<p>\u672c\u6765\u8fd9\u7bc7\u6587\u7ae0\u9884\u8ba19\u70b9\u5c31\u53ef\u4ee5\u53d1\u5e03\uff0c\u7ed3\u679c\u62d6\u5230\u73b0\u5728\uff0c\u4e3a\u4ec0\u4e48\u5462\uff1f\u554a\uff0c\u8bf4\u6765\u8bdd\u957f\uff0c\u5f53\u65f6\u6211\u5199\u6587\u7ae0\u6b63\u8fdb\u5165\u4f53\u9a8c\u9ad8\u5cf0\u72b6\u6001\uff0c\u7a81\u7136\u5916\u9762\u6709\u4eba\u6572\u7a97\u6237\uff0c\u6211\u4ee5\u6781\u6162\u7684\u901f\u5ea6\u8f6c\u8fc7\u5934\uff0c<br 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href=\"http:\/\/www.zhangxinxu.com\/\">\u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b<\/a>[<a href=\"http:\/\/www.zhangxinxu.com\/\">http:\/\/www.zhangxinxu.com<\/a>]<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a 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