function isDate(sDate) {
   var re = /^\d{1,2}\/\d{1,2}\/\d{2,}$/
   if (re.test(sDate)) {
      var dArr = sDate.split("/");
      var d = new Date(sDate);
      return d.getMonth() + 1 == dArr[0] && d.getDate() == dArr[1] && d.getFullYear() == dArr[2];
   }
   else {
      return false;
   }
}

function dateRange(fromDate,toDate)
{
var fDate=new Date(fromDate);
var tDate=new Date(toDate);
if(fDate>tDate)
return false;
else
return true;
}