function sAlert(strTitle,strContent){     
   var msgw,msgh,bordercolor;     
   msgw=400;//提示窗口的宽度     
   msgh=100;//提示窗口的高度     
   titleheight=20; //提示窗口标题高度     
   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=screen.height;     
   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=20,finishOpacity=70";     
   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 = "50%";     
            msgObj.style.top = "50%";     
            msgObj.style.font="12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";     
            msgObj.style.marginLeft = "-225px" ;     
            msgObj.style.marginTop = -75+document.documentElement.scrollTop+"px";     
            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=70,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.title = "Close";    
     title.innerHTML="<table border='0' width='100%'><tr><td align='left'><b>"+ strTitle +"</b></td><td>Close</td></tr></table></div>";     
     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("p");     
     txt.style.margin="1em 0"     
     txt.setAttribute("id","msgTxt");     
     txt.innerHTML=strContent;     
           document.getElementById("msgDiv").appendChild(txt);     
            }