JS遮罩層

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<!DOCTYPE html><html><head><meta charset="utf-8"><title>全屏div</title><style>html,body {    margin:0;    height:100%;}#test {    width:100%;    height:100%;    background-color:#000;    position:absolute;    top:0;    left:0;    z-index:2;    opacity:0.3;    /*相容IE8及以下版本瀏覽器*/    filter: alpha(opacity=30);    display:none;}#log_window {    width:200px;    height:200px;    background-color:#FF0;        margin: auto;    position: absolute;    z-index:3;    top: 0;    bottom: 0;    left: 0;    right: 0;    display:none;}</style><script>function shield(){    var s = document.getElementById("test");    s.style.display = "block";      //  var l = document.getElementById("log_window");    //l.style.display = "block";}function cancel_shield(){    var s = document.getElementById("test");    s.style.display = "none";        //var l = document.getElementById("log_window");    //l.style.display = "none";}</script></head><body><a href="javascript:shield()">開啟遮罩</a><div id="test"></div><div id="log_window"><a href="javascript:cancel_shield()">關閉</a></div></body></html>

 

JS遮罩層

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