仿XP关机效果的弹出窗口（JS+样式实现）
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>仿XP关机效果的弹出窗口</title>
<style> html,body{font-size:12px;margin:0px;height:100%;}
.mesWindow{border:#666 1px solid;background:#fff;}
.mesWindowTop{border-bottom:#eee 1px solid;margin-left:4px;padding:3px;font-weight:bold;text-align:left;font-size:12px;}
.mesWindowContent{margin:4px;font-size:12px;}
.mesWindow .close{height:15px;width:28px;border:none;cursor:pointer;text-decoration:underline;background:#fff}
</style>
<script>
var isIe=(document.all)?true:false; //设置select的可见状态
function setSelectState(state)
{ var objl=document.getElementsByTagName('select');
for(var i=0;i<objl.length;i++)
{ objl[i].style.visibility=state; }
}
function mousePosition(ev)
{ if(ev.pageX || ev.pageY)
{ return {x:ev.pageX, y:ev.pageY}; }
return { x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,y:ev.clientY + document.body.scrollTop - document.body.clientTop };
}
function showMessageBox(wTitle,content,pos,wWidth)//弹出窗口
{ closeWindow();
var bWidth=parseInt(document.documentElement.scrollWidth);
var bHeight=parseInt(document.documentElement.scrollHeight);
if(isIe){ setSelectState('hidden');}
var back=document.createElement("div"); back.id="back";
var styleStr="top:0px;left:0px;position:absolute;background:#666;width:"+bWidth+"px;height:"+bHeight+"px;";
styleStr+=(isIe)?"filter:alpha(opacity=0);":"opacity:0;";
back.style.cssText=styleStr;
document.body.appendChild(back);
//showBackground(back,100); //原值：showBackground(back,50);
var mesW=document.createElement("div");
mesW.id="mesWindow";
mesW.className="mesWindow";
mesW.innerHTML="<div class='mesWindowTop'><table width='100%' height='100%'><tr><td>"+wTitle+"</td><td style='width:1px;'><input type='button' onclick='closeWindow();' title='关闭
窗口' class='close' value='关闭' /></td></tr></table></div><div class='mesWindowContent' id='mesWindowContent'>"+content+"</div><div class='mesWindowBottom'></div>";
styleStr="left:"+(((pos.x-wWidth)>0)?(pos.x-wWidth):pos.x)+"px;top:"+(pos.y)+"px;position:absolute;width:"+wWidth+"px;";
mesW.style.cssText=styleStr; document.body.appendChild(mesW);
}
function showBackground(obj,endInt) //让背景渐渐变暗
{ if(isIe) { obj.filters.alpha.opacity+=1;
if(obj.filters.alpha.opacity<endInt)
{ setTimeout(function(){showBackground(obj,endInt)},5); } }
else
{ var al=parseFloat(obj.style.opacity);al+=0.01; obj.style.opacity=al;
if(al<(endInt/100)) {setTimeout(function(){showBackground(obj,endInt)},5);}
}
}
function closeWindow() //关闭窗口
{ if(document.getElementById('back')!=null)
{ document.getElementById('back').parentNode.removeChild(document.getElementById('back')); }
if(document.getElementById('mesWindow')!=null)
{ document.getElementById('mesWindow').parentNode.removeChild(document.getElementById('mesWindow')); }
if(isIe){ setSelectState('');}
}
function testMessageBox(ev) //测试弹出窗口
{ var objPos = mousePosition(ev);
messContent="<div style='padding:20px 0 20px 0;text-align:center'>消息正文<br>消息正文<br>消息正文<br></div>";
showMessageBox('窗口标题',messContent,objPos,350); }
</script>
</head>
<body> <div style="padding:20px"> <div style="text-align:left";><a href="#none" onclick="testMessageBox(event);">弹出窗口</a></div> <div
style="text-align:left;padding-left:20px;padding-top:10px";><select ID="Select1" NAME="Select1"><option>下拉</option></select>弹出窗口时会将其隐藏，关闭时会让其显示，目的是在IE中
防止弹出的DIV挡不住下拉框</div> <div style="text-align:center";><a href="#none" onclick="testMessageBox(event);">弹出窗口</a></div> <div style="text-align:right";><a href="#none"
onclick="testMessageBox(event);">弹出窗口</a></div> </div>
</body>
</html>
