这篇文章主要介绍了jQuery怎么实现弹出窗口弹出div层的相关知识，内容详细易懂，操作简单快捷，具有一定借鉴价值，相信大家阅读完这篇jQuery怎么实现弹出窗口弹出div层文章都会有所收获，下面我们一起来看看吧。
jQuery代码：
$(function(){
var screenwidth,screenheight,mytop,getPosLeft,getPosTop
screenwidth = $(window).width();
screenheight = $(window).height();
//获取滚动条距顶部的偏移
mytop = $(document).scrollTop();
//计算弹出层的left
getPosLeft = screenwidth/2 - 260;
//计算弹出层的top
getPosTop = screenheight/2 - 150;
//css定位弹出层
$("#box").css({"left":getPosLeft,"top":getPosTop});
//当浏览器窗口大小改变时...
$(window).resize(function(){
<span > </span>screenwidth = $(window).width();
<span > </span>screenheight = $(window).height();
<span > </span>mytop = $(document).scrollTop();
<span > </span>getPosLeft = screenwidth/2 - 260;
<span > </span>getPosTop = screenheight/2 - 150;
<span > </span>$("#box").css({"left":getPosLeft,"top":getPosTop+mytop});
});
//当拉动滚动条时...
$(window).scroll(function(){
<span > </span>screenwidth = $(window).width();
<span > </span>screenheight = $(window).height();
<span > </span>mytop = $(document).scrollTop();
<span > </span>getPosLeft = screenwidth/2 - 260;
<span > </span>getPosTop = screenheight/2 - 150;
<span > </span>$("#box").css({"left":getPosLeft,"top":getPosTop+mytop});
});
//点击链接弹出窗口
$("#popup").click(function(){
<span > </span>$("#box").fadeIn("fast");
<span > </span>//获取页面文档的高度
<span > </span>var docheight = $(document).height();
<span > </span>//追加一个层，使背景变灰
<span > </span>$("body").append("<div id='greybackground'></div>");
<span > </span>$("#greybackground").css({"opacity":"0.5","height":docheight});
<span > </span>return false;
});
//点击关闭按钮
$("#closeBtn").click(function() {
<span > </span>$("#box").hide();
<span > </span>//删除变灰的层
<span > </span>$("#greybackground").remove();
<span > </span>return false;
});
});html代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jquery pop up</title>
<script src=http://blog.soso.com/qz.q/"jquery.js" type="text/javascript"></script>
<style type="text/css">
* {margin:0;padding:0;}
#wrapper {height:1000px;}
#box {display:none;position:absolute;width:520px;height:300px;border:#f60 solid 2px;z-index:200;background:#fff;}
#closeBtn {position:absolute;right:10px;top:10px;cursor:pointer;}
#greybackground {background:#000;display:block;z-index:100;width:100%;position:absolute;top:0;left:0;}
</style>
</head>
<body>
<div id="wrapper">
<a href=http://blog.soso.com/qz.q/"#" id="popup">点击弹出div窗口</a>
</div>
<div id="box">
<span > </span><span id="closeBtn">关闭</span>
</div>
</body>
</html>关于“jQuery怎么实现弹出窗口弹出div层”这篇文章的内容就介绍到这里，感谢各位的阅读！相信大家对“jQuery怎么实现弹出窗口弹出div层”知识都有一定的了解，大家如果还想学习更多知识，欢迎关注亿速云行业资讯频道。
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