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  • html js 遮罩层

     1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     2  <html xmlns="http://www.w3.org/1999/xhtml" >
     3 <head>
     4     <title>DIV CSS遮罩层</title>
     5     <script language="javascript" type="text/javascript">
     6         function showdiv() {            
     7             document.getElementById("bg").style.display = "block";
     8             document.getElementById("show").style.display = "block";
     9         }
    10         function hidediv() {
    11             document.getElementById("bg").style.display = 'none';
    12             document.getElementById("show").style.display = 'none';
    13         }
    14     </script>
    15     <style type="text/css">
    16         #bg{ display: none;  position: absolute;  top: 0%;  left: 0%;  width: 100%;  height: 100%;  background-color: black;  z-index:1001;  -moz-opacity: 0.7;  opacity:.70;  filter: alpha(opacity=70);}
    17         #show{display: none;  position: absolute;  top: 25%;  left: 22%;  width: 53%;  height: 49%;  padding: 8px;  border: 8px solid #E8E9F7;  background-color: white;  z-index:1002;  overflow: auto;}
    18     </style>
    19 </head>
    20 <body>
    21     <input id="btnshow" type="button" value="Show" onclick="showdiv();" />
    22     <div id="bg"></div>
    23     <div id="show">测试
    24         <input id="btnclose" type="button" value="Close" onclick="hidediv();" />
    25     </div>
    26 </body>
    27 </html>
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    Copy上面的代码到HTML页面即可查看效果。

    原理比较简单,就是在页面内先定义好需要显示的DIV和遮罩层的CSS,然后用在onclick事件时,通过JS去控制两个DIV的样式:display='block' or display='none'.就可以实现DIV的显示和隐藏。

    注意两个DIV的z-index,显示在最上面的DIV的z-index一定要比遮罩层的z-index大。

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  • 原文地址:https://www.cnblogs.com/tianciliangen/p/3447140.html
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