DIV+CSS+JS 变灰弹出层_javascript技巧

浮动层居中的对话框效果演示

<title>浮动层居中的对话框效果演示</title> <meta http-equiv="content-type" content="application/xhtml+xml; charset=gb2312"> <style type="text/css"> HTML { HEIGHT: 100% } BODY { HEIGHT: 100% } BODY { FONT-SIZE: 14px; FONT-FAMILY: Tahoma, Verdana, sans-serif } DIV.neat-dialog-cont { Z-INDEX: 98; BACKGROUND: none transparent scroll repeat 0% 0%; LEFT: 0px; WIDTH: 100%; POSITION: absolute; TOP: 0px; HEIGHT: 100% } DIV.neat-dialog-bg { Z-INDEX: -1; FILTER: alpha(opacity=70); LEFT: 0px; WIDTH: 100%; POSITION: absolute; TOP: 0px; HEIGHT: 100%; BACKGROUND-COLOR: #eee; opacity: 0.7 } DIV.neat-dialog { BORDER-RIGHT: #555 1px solid; BORDER-TOP: #555 1px solid; Z-INDEX: 99; MARGIN-LEFT: auto; BORDER-LEFT: #555 1px solid; WIDTH: 30%; MARGIN-RIGHT: auto; BORDER-BOTTOM: #555 1px solid; POSITION: relative; TOP: 25%; BACKGROUND-COLOR: #fff } DIV.neat-dialog-title { PADDING-RIGHT: 0.3em; PADDING-LEFT: 0.3em; FONT-SIZE: 0.8em; PADDING-BOTTOM: 0.1em; MARGIN: 0px; LINE-HEIGHT: 1.2em; PADDING-TOP: 0.1em; BORDER-BOTTOM: #444 1px solid; POSITION: relative } IMG.nd-cancel { RIGHT: 0.2em; POSITION: absolute; TOP: 0.2em } DIV.neat-dialog P { PADDING-RIGHT: 0.2em; PADDING-LEFT: 0.2em; PADDING-BOTTOM: 0.2em; PADDING-TOP: 0.2em; TEXT-ALIGN: center } </style> <script type="text/javascript"> function NeatDialog(sHTML, sTitle, bCancel) { window.neatDialog = null; this.elt = null; if (document.createElement && document.getElementById) { var dg = document.createElement("div"); dg.className = "neat-dialog"; if (sTitle) sHTML = '<div class="neat-dialog-title">'+sTitle+ ((bCancel)? '<img src="x.gif" alt="Cancel" class="nd-cancel" />':'')+ '</script>

\n' + sHTML; dg.innerHTML = sHTML; var dbg = document.createElement("div"); dbg.id = "nd-bdg"; dbg.className = "neat-dialog-bg"; var dgc = document.createElement("div"); dgc.className = "neat-dialog-cont"; dgc.appendChild(dbg); dgc.appendChild(dg); //adjust positioning if body has a margin if (document.body.offsetLeft > 0) dgc.style.marginLeft = document.body.offsetLeft + "px"; document.body.appendChild(dgc); if (bCancel) document.getElementById("nd-cancel").onclick = function() { window.neatDialog.close(); }; this.elt = dgc; window.neatDialog = this; } } NeatDialog.prototype.close = function() { if (this.elt) { this.elt.style.display = "none"; this.elt.parentNode.removeChild(this.elt); } window.neatDialog = null; } function openDialog() { var sHTML = '

你现在看到的是一个层窗口，是被JS控制弹出的，www.jb51.net脚本之家！

'+ '

关闭

'; new NeatDialog(sHTML, "欢迎光临!", false); }

浮动层居中的效果

点此演示效果
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]