jquery可以处理很多东西，不过自带的弹窗没有找到。找到一个流行的popup_layer.js，效果还不错，特发出来大家共享一下。
下载popup_layer.js文件请猛击：http://dl.vmall.com/c0sx2beaz7
此弹窗可以使弹出来复层居中，并覆盖底层的数据
Javascripters大作--jQuery弹层类.html
触发元素9示例9：综合效果
var t9 = new PopupLayer({trigger:"#ele9",popupBlk:"#blk9",closeBtn:"#close9",
useOverlay:true,useFx:true,offsets:{x:0,y:-41}});
t9.doEffects = function(way){
if(way == "open"){
this.popupLayer.css({opacity:0.3}).show(400,function(){
this.popupLayer.animate({
left:($(document).width() - this.popupLayer.width())/2,
top:(document.documentElement.clientHeight -
this.popupLayer.height())/2 + $(document).scrollTop(),
opacity:0.8
},1000,function(){this.popupLayer.css("opacity",1)}.binding(this));
}.binding(this));
}
else{
this.popupLayer.animate({
left:this.trigger.offset().left,
top:this.trigger.offset().top,
opacity:0.1
},{duration:500,complete:function(){
this.popupLayer.css("opacity",1);this.popupLayer.hide()}.binding(this)});
}
}