JS+CSS实现Div弹出窗口同时背景变暗的方法

本文实例讲述了JS+CSS实现Div弹出窗口同时背景变暗的方法。分享给大家供大家参考。具体实现方法如下:

复制代码 代码如下:
<html>
<head>
<title>JS+CSS实现的Div弹出窗口,同时背景变暗</title>
<script>  
  function    locking(){  
   document.all.ly.style.display="block";  
   document.all.ly.style.width=document.body.clientWidth;  
   document.all.ly.style.height=document.body.clientHeight;  
   document.all.Layer2.style.display='block'; 
   }  
  function    Lock_CheckForm(theForm){  
   document.all.ly.style.display='none';document.all.Layer2.style.display='none';
  return   false;  
   }  
    </script>
    <style type="text/css">
<!--
.STYLE1 {font-size: 12px}
a:link {
color: #000;
text-decoration: none;
}
a:visited {
text-decoration: none;
}
a:hover {
text-decoration: none;
}
a:active {
text-decoration: none;
}
-->
</style>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
    <p align="center">
        <input type="button" value="弹出DIV" onClick="locking()" />
    </p>
    <div id="ly" style="position: absolute; top: 0px; filter: alpha(opacity=60); background-color: #777;
         z-index: 2; left: 0px; display: none;">
    </div>
    <!--          浮层框架开始         -->
    <div id="Layer2" align="center" style="position: absolute; z-index: 3; left: expression((document.body.offsetWidth-540)/2); top: expression((document.body.offsetHeight-170)/10);
         background-color: #fff; display: none;" >
        <table width="540" height="300" border="0" cellpadding="0" cellspacing="0" style="border: 0    solid    #e7e3e7;
             border-collapse: collapse ;" >
            <tr>
                <td style="background-color: #73A2d6; color: #fff; padding-left: 4px; padding-top: 2px;
                     font-weight: bold; font-size: 12px;" height="10" valign="middle">
                     <div align="right"><a href=JavaScript:; class="STYLE1" onclick="Lock_CheckForm(this);">[关闭]</a> &nbsp;&nbsp;&nbsp;&nbsp;</div></td>
            </tr>
            <tr>
                <td height="130" align="center">
<br><br><hr><p align="center"><font color=red>本特效收集于互联网,只为兴趣与学习交流,不作商业用途。来源:</font></p>
                </td>
            </tr>
        </table>
    </div>
    <!--  浮层框架结束-->
</body>
</html>

希望本文所述对大家的javascript程序设计有所帮助。