var NowDate=new Date("2008/7/5");
var StartDate=new Date("2008/2/2");
var EndDate=new Date("2009/6/11");
var Adcontent="200861921145172423.gif";
var InsteadAD="";
var IsShow=true;
if ((IsShow)&&(NowDate>=StartDate)&&(NowDate<EndDate)){
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}else{
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}