function sAlert(str,width,height,color){
	var msgw,msgh,bordercolor;
	msgw=width;//提示窗口的宽度
	msgh=height;//提示窗口的高度
	titleheight=25 //提示窗口标题高度
	bordercolor=color;//提示窗口的边框颜色
	titlecolor=color;//提示窗口的标题颜色
	
	var sWidth,sHeight;
	sWidth=document.body.scrollWidth;
	sHeight=document.body.scrollHeight<document.body.clientHeight?document.body.clientHeight:document.body.scrollHeight;

	var bgObj=document.createElement("div");
	bgObj.setAttribute('id','bgDiv');
	bgObj.style.position="absolute";
	bgObj.style.top="0";
	bgObj.style.background="#cccccc";
	bgObj.style.filter="progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=90";
	bgObj.style.opacity="0.6";
	bgObj.style.left="0";
	bgObj.style.width=sWidth + "px";
	bgObj.style.height=sHeight + "px";
	bgObj.style.zIndex = "10000";
	document.body.appendChild(bgObj);
	
	var msgObj=document.createElement("div")
	msgObj.setAttribute("id","msgDiv");
	msgObj.setAttribute("align","center");
	msgObj.style.background = "white";
	msgObj.style.border="1px solid " + bordercolor;
	msgObj.style.position = "absolute";
	msgObj.style.left = ((document.body.clientWidth-msgw)/2 + document.body.scrollLeft).toString() + "px";
	msgObj.style.top = ((document.body.clientHeight-msgh)/2 + document.body.scrollTop).toString() + "px";
	msgObj.style.font="12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";
	msgObj.style.width = msgw + "px";
	msgObj.style.height = msgh + "px";
	msgObj.style.textAlign = "center";
	msgObj.style.lineHeight ="25px";
	msgObj.style.zIndex = "10001";

   var title=document.createElement("h4");
   title.setAttribute("id","msgTitle");
   title.setAttribute("align","right");
   title.style.margin="0";
   title.style.padding="3px";
   title.style.background=bordercolor;
   title.style.filter="progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);";
   title.style.opacity="0.75";
   title.style.border="1px solid " + bordercolor;
   title.style.height="18px";
   title.style.font="12px Verdana, Geneva, Arial, Helvetica, sans-serif";
   title.style.color="white";
   title.style.cursor="pointer";
   title.innerHTML="算了，让我再想一想 X ";
   title.onclick=function(){
		document.body.removeChild(bgObj);
		document.getElementById("msgDiv").removeChild(title);
		document.body.removeChild(msgObj);
		}
   document.body.appendChild(msgObj);
   document.getElementById("msgDiv").appendChild(title);
   var txt=document.createElement("div");
   txt.style.textAlign = "left";
   txt.style.margin="1em 0";
   txt.setAttribute("id","msgTxt");
   txt.innerHTML=str;
   document.getElementById("msgDiv").appendChild(txt);
}

function removeWindow(){
	document.body.removeChild(document.getElementById("bgDiv"));
	document.body.removeChild(document.getElementById("msgDiv"));
}