JAVASCRIPT 弹出层

tag:Javascript 弹出窗口 弹出层 模式对话框 

function sAlert(str,time){
   var msgw,msgh,bordercolor;
   msgw=400;//Width
   msgh=100;//Height
   titleheight=25 //title Height
   bordercolor="#336699";//boder color
   titlecolor="#99CCFF";//title color
   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="#000";
   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";
   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","center");
   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";
 
   var waitMsg="请等待... ";
  
   title.innerHTML=waitMsg;
   var sec=time;
   var clearAlertFun=function(){
            document.body.removeChild(bgObj);
            document.getElementById("msgDiv").removeChild(title);
            document.body.removeChild(msgObj);
          }
   timerID=window.setInterval(function(){
   try{
   if(sec<0){
    title.onclick=clearAlertFun;
     title.style.cursor="pointer";
          window.clearInterval(timerID);
          document.getElementById("msgTitle").innerHTML='操作超时，请点击关闭'
   }else
   document.getElementById("msgTitle").innerHTML=waitMsg+sec--+'s';
   }catch(e)
   {
    window.clearInterval(timerID);
   }
  ;},1000);
  
   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=str;
   document.getElementById("msgDiv").appendChild(txt);
}
function   cAlert()
{
  document.body.removeChild(document.getElementById("bgDiv"));
        document.getElementById("msgDiv").removeChild(document.getElementById("msgTitle"));
        document.body.removeChild(document.getElementById("msgDiv"));
}

修改自：http://www.cnblogs.com/blodfox777/archive/2008/05/26/1207337.html