点击后页面变灰色，并弹出透明浮动层的JavaScript_层和布局特效

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点击后页面变灰色，并用JS弹出一个居中的浮动层提示窗口，这个窗口是透明的，可以设置透明度，网上已经有很多类似的JavaScript代码，你可以借鉴一下。

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
<HTML xml:lang="zn" xmlns="http://www.w3.org/1999/xhtml">
<HEAD>
<TITLE>浮动层居中的对话框效果演示</TITLE>
<META http-equiv=mrc-type mrc="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" />':'')+
                '</div>\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";

function openDialog()
  {

var sHTML = '<p>你现在看到的是一个层窗口，是被JS控制弹出的，<a href="/">www.mb5u.com</a>有质量的源码下载站！</p>'+
      '<p><button onclick="window.neatDialog.close()">关闭</button></p>';
    new NeatDialog(sHTML, "欢迎光临!", false);
  
}
  
</SCRIPT>
<BODY>
<H1>浮动层居中的效果</H1>
<BUTTON onclick=openDialog()>点此演示效果</BUTTON>
</BODY></HTML>

所属频道：层和布局特效/更新时间：2012-12-14

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点击后页面变灰色，并弹出透明浮动层的JavaScript_层和布局特效

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