jquery实现弹出层完美居中效果

复制代码 代码如下:

showDiv($("#pop"));

function showDiv(obj){

$(obj).show();

center(obj);

$(window).scroll(function(){

center(obj);

});

$(window).resize(function(){

center(obj);

});

}

function center(obj){

var windowWidth = document.documentElement.clientWidth;

var windowHeight = document.documentElement.clientHeight;

var popupHeight = $(obj).height();

var popupWidth = $(obj).width();

$(obj).css({

"position": "absolute",

"top": (windowHeight-popupHeight)/2+$(document).scrollTop(),

"left": (windowWidth-popupWidth)/2

});

}