function alertWin(title, msg, w, h){ 
	var titleheight = "25px"; // 窗口标题高度 
	var bordercolor = "#336699"; // 提示窗口的边框颜色 
	var titlecolor = "#FFFFFF"; // 窗口标题颜色 
	var titlebgcolor = "#336699"; // 窗口标题背景色
	var bgcolor = "#FFFFFF"; // 提示内容的背景色
	
	var iWidth = document.documentElement.clientWidth; 
	var iHeight = document.documentElement.clientHeight; 
	var bgObj = document.createElement("div"); 
	bgObj.style.cssText = "position:absolute;left:0px;top:0px;width:"+iWidth+"px;height:"+Math.max(document.body.clientHeight, iHeight)+"px;filter:Alpha(Opacity=30);opacity:0.3;background-color:#000000;z-index:101;";
	document.body.appendChild(bgObj); 
	
	var msgObj=document.createElement("div");
	msgObj.style.cssText = "position:absolute;font:11px '宋体';top:"+(iHeight-h)/2+"px;left:"+(iWidth-w)/2+"px;width:"+w+"px;height:"+h+"px;text-align:center;border:1px solid "+bordercolor+";background-color:"+bgcolor+";padding:1px;line-height:22px;z-index:102;";
	document.body.appendChild(msgObj);
	
	var table = document.createElement("table");
	msgObj.appendChild(table);
	table.style.cssText = "margin:0px;border:0px;padding:0px;";
	table.cellSpacing = 0;
	var tr = table.insertRow(-1);
	var titleBar = tr.insertCell(-1);
	//titleBar.style.cssText = "width:100%;height:"+titleheight+"px;text-align:left;padding:3px;margin:0px;font:bold 13px '宋体';color:"+titlecolor+";border:1px solid " + bordercolor + ";background-color:" + titlebgcolor;
	titleBar.style.cssText ="width:240px;height:25px;font:bold 14px '宋体';color:#FFFFFF;text-align:left;background-image: url(Images/top_login_2.gif);"
	titleBar.style.paddingLeft = "10px";
	titleBar.innerHTML = title;
	
	var closeBtn = tr.insertCell(-1);
	closeBtn.style.cssText = "cursor:pointer; background-image: url(Images/top_login_2.gif); width:41px;" + titlebgcolor;
	closeBtn.innerHTML = "<img src=Images/top_login_1.gif border=0>";
	closeBtn.onclick = function(){ 
		document.body.removeChild(bgObj); 
		document.body.removeChild(msgObj); 
	} 
	var msgBox = table.insertRow(-1).insertCell(-1);
	msgBox.style.cssText = "font:10pt '宋体';";
	msgBox.colSpan  = 2;
	msgBox.innerHTML = msg;
	
    // 获得Event对象，用于兼容IE和FireFox
    function getEvent() {
	    return window.event || arguments.callee.caller.arguments[0];
    }
}