jquery实现div遮罩层

 <!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遮罩层</title>

   <style type="text/css">

       #BgDiv{background-color:#e3e3e3; position:absolute; z-index:99; left:0; top:0; display:none; width:100%; height:1000px;opacity:0.5;filter: alpha(opacity=50);-moz-opacity: 0.5;}

       #DialogDiv{position:absolute;width:400px; left:50%; top:50%; margin-left:-200px; height:auto; z-index:100;background-color:#fff; border:1px #8FA4F5 solid; padding:1px;}

       #DialogDiv h2{ height:25px; font-size:14px; background-color:#8FA4F5; position:relative; padding-left:10px; line-height:25px;}

       #DialogDiv h2 a{position:absolute; right:5px; font-size:12px; color:#000000}

       #DialogDiv .form{padding:10px;}

       #DialogDiv2{position:absolute;width:400px; left:50%; top:50%; margin-left:-200px; height:auto; z-index:100;background-color:#fff; border:1px #8FA4F5 solid; padding:1px;}

       #DialogDiv2 h2{ height:25px; font-size:14px; background-color:#8FA4F5; position:relative; padding-left:10px; line-height:25px;}

       #DialogDiv2 h2 a{position:absolute; right:5px; font-size:12px; color:#000000}

       #DialogDiv2 .form{padding:10px;}

       #DialogDiv3{position:absolute;width:400px; left:50%; top:50%; margin-left:-200px; height:auto; z-index:100;background-color:#fff; border:1px #8FA4F5 solid; padding:1px;}

       #DialogDiv3 h2{ height:25px; font-size:14px; background-color:#8FA4F5; position:relative; padding-left:10px; line-height:25px;}

       #DialogDiv3 h2 a{position:absolute; right:5px; font-size:12px; color:#000000}

       #DialogDiv3 .form{padding:10px;}

   </style>

   <script language="javascript" type="text/javascript" src="../js/jquery-1.8.3.js"></script>

   <script language="javascript" type="text/javascript">

    function ShowDIV(thisObjID) {

           $("#BgDiv").css({ display: "block", height: $(document).height() });

           var yscroll = document.documentElement.scrollTop;

           $("#" + thisObjID ).css("top", "100px");

           $("#" + thisObjID ).css("display", "block");

     document.documentElement.scrollTop = 0;

       }

       function closeDiv(thisObjID) {

           $("#BgDiv").css("display", "none");

           $("#" + thisObjID).css("display", "none");

       }

  </script>

  </head>

  <body>

   <div id="BgDiv"></div>

   <!--遮罩层显示的DIV1-->

   <div id="DialogDiv" style="display:none">

     <h2>弹出层<a href="#" id="btnClose" onclick="closeDiv('DialogDiv')">关闭</a></h2>

    <div class="form">我是弹出对话框111111！！</div>

   </div>

   <!--遮罩层显示的DIV2-->

   <div id="DialogDiv2" style="display:none">

     <h2>弹出层<a href="#" id="btnClose2" onclick="closeDiv('DialogDiv2')">关闭</a></h2>

    <div class="form">我是弹出对话框2222！！</div>

   </div>

   <!--遮罩层显示的DIV3-->

   <div id="DialogDiv3" style="display:none">

     <h2>弹出层<a href="#" id="btnClose3" onclick="closeDiv('DialogDiv3')">关闭</a></h2>

    <div class="form">我是弹出对话框3333333！！</div>

   </div> 

   <p>

    <input value="弹出遮罩层1" type="button" id="btnShow1" onclick="ShowDIV('DialogDiv')" />

    <input value="弹出遮罩层2" type="button" id="btnShow2"  onclick="ShowDIV('DialogDiv2')" />

    <input value="弹出遮罩层3" type="button" id="btnShow3"  onclick="ShowDIV('DialogDiv3')" />

   </p>

  </body>

 </html>
巴特西

jquery实现div遮罩层

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