下面 这个 只在 火狐里 有效,求 指点 在 火狐 和  ie6里 均 有效 的 css
.btm /*半透明层*/
{
position:absolute;
left:0;
top:0;
height:100%;
width:100%; 
background:#000; 
filter: alpha(opacity=50); 
-moz-opacity:0.5; 
opacity: 0.5; 
z-index:1000;}

解决方案 »

  1.   


    filter: alpha(opacity=50); 
    -moz-opacity:0.5; 
    opacity: 0.5; 
    这句 不、就是让浏览器都有 滤镜的效果么 
      

  2.   

    <!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></title>
    <style type="text/css">
     #container{ border:1px solid #c00; background-color:rgba(212,0,0,0.5); background:#f00\9; filter:alpha(opacity=50); width:500px; margin:40px auto; line-height:200%; font-size:14px; padding:14px;}
     #container *{ position:relative;}
    </style>
    </head>
    <body>
     <div id="container">
         <span>我是内容我是内容我是内容我是内容我</span>
        </div>
    </body>
    </html>