//弹出窗口的构造函数
function DIVAlert(str,msgw,msgh){
         var bordercolor;

      //msgw=400;//提示窗口的宽度

      //msgh=200;//提示窗口的高度

      titleheight=25 //提示窗口标题高度

      bordercolor="#996600";//提示窗口的边框颜色

      titlecolor="#D9CAA8";//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=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","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="关闭";

        title.onclick=function(){
                    document.body.removeChild(bgObj);
                    document.getElementById("msgDiv").removeChild(title);
                    document.body.removeChild(msgObj);
                   }
/*
        var close=document.createElement("h4");
        close.setAttribute("id","msgTitle");
        close.setAttribute("align","right");
        close.style.margin="0";
        close.style.padding="3px";
        close.style.background=bordercolor;
        close.style.filter="progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);";
        close.style.opacity="0.75";
        close.style.border="1px solid " + bordercolor;
        close.style.height="18px";
        close.style.font="12px Verdana, Geneva, Arial, Helvetica, sans-serif";
        close.style.color="white";
        close.style.cursor="pointer";
        close.innerHTML="关闭";
        */

        document.body.appendChild(msgObj);

        document.getElementById("msgDiv").appendChild(title);

        var txt=document.createElement("div");

        txt.style.margin="1em 0"

        txt.setAttribute("id","msgTxt");

        txt.innerHTML=str;

              document.getElementById("msgDiv").appendChild(txt);

      }


//弹出窗口的清除函数
function removeDIVAlert()
{
    var body = document.body;
    body.removeChild($("#bgDiv")[0]);
    body.removeChild($("#msgDiv")[0]);
    return false;
}