急请版主和高手:一个div自动关闭问题,急请高手帮助!!
在页面上放个服务器控件button 
 该按钮的click后台代码事件实现如下功能:点击后在该页面弹出一个div的提示框!然后执行一个比较费时的代码,代码执行完毕后,该div提示框自动关闭!请问怎么实现?   
 现在问题是该div不能自动关闭. 
 我给关闭的代码放在另外一个按钮中,点击后能够关闭,可放在同一个事件中怎么关闭不了?我在线等待各高手回答,谢谢 
------解决方案-------------------- <HTML>  <HEAD>  
  <META content= "MSHTML 6.00.2800.1586 " name=GENERATOR>  </HEAD>  
  <BODY>  <INPUT onclick= "sAlert( '正在导入... <br/> 正在将Word文档导入到编辑器,请稍候...  <br/>  我的有限公司 '); " type=button value=点击这里>  
  <SCRIPT language=javascript type=text/javascript>  
 //Author:Daviv 
 //Blog: <a href= " <a href= "http://blog.163.com/jxdawei " target= "_blank "> http://blog.163.com/jxdawei </a>  " target= "_blank ">  <a href= "http://blog.163.com/jxdawei " target= "_blank "> http://blog.163.com/jxdawei </a>  </a>  
 //Date:2006-10-28 
 //Email:jxdawei@gmail.com 
             function sAlert(str){ 
             var msgw,msgh,bordercolor; 
             msgw=400;//提示窗口的宽度 
             msgh=100;//提示窗口的高度 
             bordercolor= "#336699 ";//提示窗口的边框颜色 
             titlecolor= "#99CCFF ";//提示窗口的标题颜色               
             var sWidth,sHeight; 
             sWidth=document.body.offsetWidth; 
             sHeight=document.body.offsetHeight;               
             var bgObj=document.createElement( "div "); 
             bgObj.setAttribute( 'id ', 'bgDiv '); 
             bgObj.style.position= "absolute "; 
             bgObj.style.top= "0 "; 
             bgObj.style.background= "#777 "; 
             bgObj.style.filter= "progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75 "; 
             bgObj.style.opacity= "0.6 "; 
             bgObj.style.left= "0 "; 
             bgObj.style.width=sWidth +  "px "; 
             bgObj.style.height=sHeight +  "px "; 
             document.body.appendChild(bgObj); 
             var msgObj=document.createElement( "div ") 
             msgObj.setAttribute( "id ", "msgDiv "); 
             msgObj.setAttribute( "align ", "center "); 
             msgObj.style.position= "absolute "; 
             msgObj.style.background= "white "; 
             msgObj.style.font= "12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif "; 
             msgObj.style.border= "1px solid  " + bordercolor; 
             msgObj.style.width=msgw +  "px "; 
             msgObj.style.height=msgh +  "px "; 
           msgObj.style.top=(document.documentElement.scrollTop + (sHeight-msgh)/2) +  "px "; 
           msgObj.style.left=(sWidth-msgw)/2 +  "px "; 
           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 ";