本篇文章主要是对点击弹出层效果&弹出窗口后网页背景变暗效果的实现代码进行了介绍，需要的朋友可以过来参考下，希望对大家有所帮助
代码如下:
<html>
<head>
<title>网页特效-窗口特效-弹出窗口后网页背景变暗的效果</title>
<meta http-equiv="content-Type" content="text/html;charset=gb2312">
<!--把下面代码加到<head>与</head>之间-->
<style type="text/css">
.black_overlay{display:none;position:absolute;top:0%;left:0%;width:100%;height:100%;background-color:black;z-index:1001;-moz-opacity:0.8;opacity:.80;filter:alpha(opacity=80);}
.white_content{display:none;position:absolute;top:25%;left:25%;width:50%;
height:50%;padding:16px;border:3px solid orange;background-color:white;z-index:1002;overflow:auto;}
</style>
</head>
<body>
<!--把下面代码加到<body>与</body>之间-->
<a href="javascript:void(0)" onclick="document.getElementById('light').style.display='block'; document.getElementById('fade').style.display='block'">
点击这里打开窗口</a>
<div id="light" class="white_content">
<a href="javascript:void(0)" onclick="document.getElementById('light').style.display='none';document.
getElementById('fade').style.display='none'">
Close</a>
<br>窗口内容
</div>
<div id="fade" class="black_overlay">123</div>
</body>
</html>
例二：
代码如下:
<!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 runat="server">
<title>无标题页</title>
<script language="javascript" type="text/javascript">
function hid()
{
var div4=document.getElementById("div1");
div4.style.display="block";
div4.style.width="200px";
div4.style.height="150px";
div4.style.zIndex="9999";
div4.style.top="43%";
div4.style.left="43%";
div4.style.position="absolute";
var div3=document.getElementById("div2");
div3.style.display="block";
div3.style.width="1000px";
div3.style.zIndex="9998";
div3.style.position="absolute";
div3.style.height=document.body.offsetHeight;
div3.style.top="0px";
div3.style.left="0px";
}
function vis()
{
var div4=document.getElementById("div1");
div4.style.display="none";
var div3=document.getElementById("div2");
div3.style.display="none";
div3.style.width="0px";
div3.style.height="0px";
div4.innerHTML="<a onclick='vis()' style='display: block' id='text'>点击关闭</a><br /><br /><input name='TextBox2' type='text' id='TextBox2' /><br /><input id='Button3'
type='button' value='button' onclick='return Button3_onclick()' />";
}
</script>
</head>
<body style="width:100%; height:100%">
<div align="center">
<table width="768" border="0" cellpadding="0" cellspacing="0">
<!--DWLayoutTable-->
<tr>
<td width="768" height="403"> <form id="form1" runat="server">
<a onclick="hid()">点击显示</a><br />
<div style="color: white; background-color: green; display: none;" id="div1">
<a onclick="vis()" style="display: block" id="text">点击关闭</a><br />
<br />
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br />
<input id="Button3" type="button" value="button" onclick="return Button3_onclick()" /></div>
<div style="filter:alpha(opacity=70);width: 1px; height: 8px;
background-color: #cccccc; left: 0px; position: absolute; top: 0px; z-index:
9998; display: none;" id="div2">
</div>
</form></td>
</tr>
</table>
</div>
</body>
</html>
例三：
代码如下:
<!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=gb2312" />
<title>点击弹出层效果</title>
<style>
* {margin:0;}
body {font-size:12px;}
#container div{margin-top:5px;}
#select_city h3{float:left;}
#main_city,#all_province {clear:both;}
#main_city div,#all_province div{width:600px;clear:left;}
#main_city h4,#all_province h4{float:left;display:inline;font-size:16px;}
#main_city div span,#all_province div span{margin:0 10px;cursor:pointer;font-size:12px;}
#float_lay{width:200px;height:120px;border:1px #d1d1d1 solid;position:absolute;background:#fff;z-index:999;display:none;}
</style>
<script type="text/javascript">
//弹出层
function openLayer(objId,conId){
var arrayPageSize = getPageSize();//调用getPageSize()函数
var arrayPageScroll = getPageScroll();//调用getPageScroll()函数
if (!document.getElementById("popupAddr")){
//创建弹出内容层
var popupDiv = document.createElement("div");
//给这个元素设置属性与样式
popupDiv.setAttribute("id","popupAddr")
popupDiv.style.position = "absolute";
popupDiv.style.border = "1px solid #ccc";
popupDiv.style.background = "#fff";
popupDiv.style.zIndex = 99;
//创建弹出背景层
var bodyBack = document.createElement("div");
bodyBack.setAttribute("id","bodybg")
bodyBack.style.position = "absolute";
bodyBack.style.width = "100%";
bodyBack.style.height = (arrayPageSize[1] + 35 + 'px');
bodyBack.style.zIndex = 98;
bodyBack.style.top = 0;
bodyBack.style.left = 0;
bodyBack.style.filter = "alpha(opacity=50)";
bodyBack.style.opacity = 0.5;
bodyBack.style.background = "#ddf";
//实现弹出(插入到目标元素之后)
var mybody = document.getElementById(objId);
insertAfter(popupDiv,mybody);//执行函数insertAfter()
insertAfter(bodyBack,mybody);//执行函数insertAfter()
}
//显示背景层
document.getElementById("bodybg").style.display = "";
//显示内容层
var popObj=document.getElementById("popupAddr")
popObj.innerHTML = document.getElementById(conId).innerHTML;
popObj.style.display = "";
//让弹出层在页面中垂直左右居中(统一)
// popObj.style.width = "600px";
// popObj.style.height = "400px";
// popObj.style.top = arrayPageScroll[1] + (arrayPageSize[3] - 35 - 400) / 2 + 'px';
// popObj.style.left = (arrayPageSize[0] - 20 - 600) / 2 + 'px';
//让弹出层在页面中垂直左右居中(个性)
var arrayConSize=getConSize(conId)
popObj.style.top = arrayPageScroll[1] + (arrayPageSize[3] - arrayConSize[1]) / 2-50 + 'px';
popObj.style.left = (arrayPageSize[0] - arrayConSize[0]) / 2 -30 + 'px';
}
//获取内容层内容原始尺寸
function getConSize(conId){
var conObj=document.getElementById(conId)
conObj.style.position = "absolute";
conObj.style.left=-1000+"px";
conObj.style.display="";
var arrayConSize=[conObj.offsetWidth,conObj.offsetHeight]
conObj.style.display="none";
return arrayConSize;
}
function insertAfter(newElement,targetElement){//插入
var parent = targetElement.parentNode;
if(parent.lastChild == targetElement){
parent.appendChild(newElement);
}
else{
parent.insertBefore(newElement,targetElement.nextSibling);
}
}
//获取滚动条的高度
function getPageScroll(){
var yScroll;
if (self.pageYOffset) {
yScroll = self.pageYOffset;
} else if (document.documentElement && document.documentElement.scrollTop){
yScroll = document.documentElement.scrollTop;
} else if (document.body) {
yScroll = document.body.scrollTop;
}
arrayPageScroll = new Array('',yScroll)
return arrayPageScroll;
}
//获取页面实际大小
function getPageSize(){
var xScroll,yScroll;
if (window.innerHeight && window.scrollMaxY){
xScroll = document.body.scrollWidth;
yScroll = window.innerHeight + window.scrollMaxY;
} else if (document.body.scrollHeight > document.body.offsetHeight){
sScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
} else {
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth,windowHeight;
//var pageHeight,pageWidth;
if (self.innerHeight) {
windowWidth = self.innerWidth;
windowHeight = self.innerHeight;
} else if (document.documentElement && document.documentElement.clientHeight) {
windowWidth = document.documentElement.clientWidth;
windowHeight = document.documentElement.clientHeight;
} else if (document.body) {
windowWidth = document.body.clientWidth;
windowHeight = document.body.clientHeight;
}
var pageWidth,pageHeight
if(yScroll < windowHeight){
pageHeight = windowHeight;
} else {
pageHeight = yScroll;
}
if(xScroll < windowWidth) {
pageWidth = windowWidth;
} else {
pageWidth = xScroll;
}
arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
return arrayPageSize;
}
//关闭弹出层
function closeLayer(){
document.getElementById("popupAddr").style.display = "none";
document.getElementById("bodybg").style.display = "none";
return false;
}
</script>
</head>
<body>
<input name="Input" id="test" value="风格设置" type="button" onclick="openLayer('test','test_con')" />
<!--第一个弹出层的内容-->
<div id="test_con" style="display:none" title="包含弹出层的内容的容器">
<div id="tab">
<div id="tabtop">
<div id="tabtop-L"><strong>风格设置</strong></div>
<div id="tabtop-R" onclick="closeLayer()"><strong>关闭</strong></div>
</div>
<div id="tabcontent">此处显示内容</div>
</div>
</div>
<br>
<br>
<br>
<input name="Input" id="test2" value="风格提示" type="button" onclick="
openLayer('test2','test_con2')" />
<!--第二个弹出层的内容-->
<div id="test_con2" style="display:none" title="包含弹出层的内容的容器">
<div id="tab2">
<div id="tabtop2">
<div id="tabtop-L2"><strong style="color:blue">设置提示</strong></div>
<div id="tabtop-R2" onclick="closeLayer()"><strong style="color:red">关闭</strong></div>
</div>
<div id="tabcontent2" style="color:#dff;background:#000">
<p>此处显示提示内容"
<p>提示1
<p>提示2
</div>
</div>
</div>
<br>
1<br>
<br>
<input name="Input" id="test3" value="风格演示" type="button" onclick="openLayer('test3','test_con3')" />
<!--第三个弹出层的内容-->
<div id="test_con3" style="display:none" title="包含弹出层的内容的容器">
<div id="tab3" style="width:300px;height:180px;background:#fee">
<div id="tabtop3">
<div id="tabtop-L3"><strong style="color:red;font-size:20px">风格演示</strong></div>
<div id="tabtop-R3" onclick="closeLayer()"><strong>关闭</strong></div>
</div>
<div id="tabcontent3">此处显示内容</div>
</div>
</div>
</body>
</html>