仿Windows关机效果：封装lightbox类
时间:2011-05-20
初始化数据时，为每个可高亮显示的链接创建了lightbox对象。该类的代码具体实现如下：
var lightbox = Class.create();
lightbox.prototype = {
yPos : 0,
xPos : 0,
//构造方法,ctrl为创建该对象的元素
initialize: function(ctrl) {
//将该元素的链接赋值给this.content
this.content = ctrl.href;
//为该元素添加onclick事件activate方法
Event.observe(ctrl, ''click'', this.activate.bindAsEventListener(this), false);
ctrl.onclick = function(){return false;};
},
//当单击链接时
activate: function(){
if (browser == ''Internet Explorer''){//判断为IE浏览器
this.getScroll();
this.prepareIE(''100%'', ''hidden'');
this.setScroll(0,0);
this.hideSelects(''hidden'');//隐藏所有的<select>标记
}
//调用该类中的displayLightbox方法
this.displayLightbox("block");
},
prepareIE: function(height, overflow){
bod = document.getElementsByTagName(''body'')[0];
bod.style.height = height;
bod.style.overflow = overflow;
htm = document.getElementsByTagName(''html'')[0];
htm.style.height = height;
htm.style.overflow = overflow;
},
hideSelects: function(visibility){
selects = document.getElementsByTagName(''select'');
for(i = 0; i < selects.length; i++) {
selects[i].style.visibility = visibility;
}
},
getScroll: function(){
if (self.pageYOffset) {
this.yPos = self.pageYOffset;
} else if (document.documentElement && document.documentElement.scrollTop){
this.yPos = document.documentElement.scrollTop;
} else if (document.body) {
this.yPos = document.body.scrollTop;
}
},
setScroll: function(x, y){
window.scrollTo(x, y);
},
displayLightbox: function(display){
//将覆盖层显示
$(''overlay'').style.display = display;
//将高亮层显示
$(''lightbox'').style.display = display;
//如果不是隐藏状态,则调用该类中的loadInfo方法
if(display != ''none'') this.loadInfo();
}
//该方法发送Ajax请求
loadInfo: function() {
//当请求完成后调用本类中processInfo方法
var myAjax = new Ajax.Request(
this.content,
{method: ''get'', parameters: "", onComplete: this.processIn
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