function checkForm()
{
   var errMsg = "";
   var startDateStr = document.forms["gorevillas"].inizioperiodo.value;
   var endDateStr = document.forms["gorevillas"].fineperiodo.value;
   
   if(startDateStr.length == 0)
   {
      errMsg = errMsg + "<li>Start Date is required</li>";
   }
   
   if(endDateStr.length == 0)
   {
      errMsg = errMsg + "<li>End Date is required</li>";
   }
   
   var startArray = startDateStr.split("-");
   var endArray = endDateStr.split("-");

   var startDateVal = new Date(startArray[0], startArray[1], startArray[2]);
   
   var endDateVal = new Date(endArray[0], endArray[1], endArray[2]);
   
   if(endDateVal <= startDateVal)
   {
       errMsg = errMsg + "<li>The End Date must be before the Start Date</li>";
   }

   if(document.forms["gorevillas"].numAdults.selectedIndex == 0)
   {
       errMsg = errMsg + "<li>The number of Adults must be greater than zero</li>";
   }
   if(errMsg != "")
   {
   document.getElementById("lblError").innerHTML = errMsg;
   return false;
   }
   else
   {
     document.getElementById("lblError").innerHTML = "";
	 document.forms["gorevillas"].submit();
   }
}