function newdaystyle(olddate,nday,ctxt,cgif){
          var days;
          days=DateDiff(olddate) ;
	  if ((days+1)<=nday)
            {
               if (cgif=="gif")
                   {
                    document.write("<span class=newgifclass><img src="+ctxt+" border=0></span>");}
                  else
                    { document.write('<span class=newtxtclass>'+ctxt+'</span>');
                    }
             }
        }

      //计算天数差的函数，通用   
      function   DateDiff(sDate2){     //sDate1和sDate2是2004-10-18格式   
          var   aDate,   oDate1,   oDate2,   iDays   
          var myDate = new Date();
          var sDate1=myDate.getFullYear()+'-'+(myDate.getMonth()+1)+'-'+myDate.getDate();  
          aDate   =   sDate1.split("-")   
          oDate1   =   new   Date(aDate[1]   +   '-'   +   aDate[2]   +   '-'   +   aDate[0])     //转换为10-18-2004格式   
          aDate   =   sDate2.split("-")   
          oDate2   =   new   Date(aDate[1]   +   '-'   +   aDate[2]   +   '-'   +   aDate[0])   
          iDays   =   parseInt(Math.abs(oDate1   -   oDate2)   /   1000   /   60   /   60   /24)     //把相差的毫秒数转换为天数
          return  iDays
          //str11=new Date(sDate1.replace("-",",")).getTime() 
          //str22=new Date(sDate2.replace("-",",")).getTime() 
	  //if (str11>str22){ 
          //return  iDays}
          //else
          //{return  0}   
      }