// JavaScript Document
var numTemp= Math.floor(Math.random()*6);   //随机产生1-5之间的数
if(!numTemp)  //如果产生的数是零
  numTemp=1;
var numStr= String(numTemp);
if (numStr.length == 1)
    numStr = "0" + numStr;
var url_BGImage = "url(/Templets/BGimages/banner" + numStr + ".jpg)";
var bgImageID=document.getElementById("banner");
if (bgImageID) {
    bgImageID.style.backgroundImage = url_BGImage;
}