点击我

var F = function(id) {
   return this.getElementById(id);
};
F.prototype.getElementById = function(id) {
    this.element = document.getElementById(id);
    return this;
};
F.prototype.hide = function() {
    this.element.style.display = "none";
};

var $ = function(id) {
    return new F(id);
};

$("button").element.onclick = function() {
    $("image1").hide();
    $("image2").hide();    
};