JS+CSS簡單實現DIV遮罩層顯示隱藏

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遮罩層</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">測試
24 <input id="btnclose" type="button" value="Close" onclick="hidediv();"/>
25 </div>
26 </body>
27 </html>javascript

複製代碼

Copy上面的代碼到HTML頁面便可查看效果。css

原理比較簡單,就是在頁面內先定義好須要顯示的DIV和遮罩層的CSS,而後用在onclick事件時,經過JS去控制兩個DIV的樣式:display='block' or display='none'.就能夠實現DIV的顯示和隱藏。html

注意兩個DIV的z-index,顯示在最上面的DIV的z-index必定要比遮罩層的z-index大java

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