标签：
1 <!DOCTYPE html> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <title></title> 6 <style> 7 #maskBackground { position: absolute; left: 0px; top: 0px; opacity: 0.2; background-color: red; display: none; z-index: 99; } 8 /*蒙板*/ 9 #maskTip { position: absolute; border: 1px solid blue; background-color: white; z-index: 100; display: none; } 10 </style> 11 <script> 12 13 function ShowMask() { 14 //让背景蒙板显示，而且在填满整个浏览器 15 var masBg = document.getElementById(‘maskBackground‘); 16 masBg.style.display = ‘block‘; 17 masBg.style.width = window.innerWidth + ‘px‘; 18 masBg.style.height = window.innerHeight + ‘px‘; 19 //让前景蒙板显示，而且在浏览器的中间 20 var maskTip = document.getElementById(‘maskTip‘); 21 22 //要更改的地方 宽度高度 23 maskTip.style.width = ‘100px‘; 24 maskTip.style.height = ‘100px‘; 25 26 maskTip.style.left = (window.innerWidth - parseInt(maskTip.style.width)) / 2 + ‘px‘; 27 maskTip.style.top = (window.innerHeight - parseInt(maskTip.style.height)) / 2 + ‘px‘; 28 maskTip.style.display = ‘block‘; 29 30 } 31 32 function HideMask() { 33 document.getElementById(‘maskBackground‘).style.display = ‘none‘; 34 document.getElementById(‘maskTip‘).style.display = ‘none‘; 35 } 36 37 </script> 38 </head> 39 <body> 40 <input type="button" id="btnShow" value="显示蒙板" onclick="ShowMask()" /> 41 <div id="maskBackground"></div> 42 <div id="maskTip"> 43 <input type="button" id="btnHide" value="关闭蒙板" onclick="HideMask()" /> 44 </div> 45 </body> 46 </html>
标签：
原文地址：http://www.cnblogs.com/DKnight/p/5167366.html
