function changeQuantity(itemNumber)
{   
if (document.getElementById("vwquantity"+itemNumber))
   {
     if(document.getElementById("vwquantity"+itemNumber).type=="select-one") {
        if (document.getElementById("vwquantity"+itemNumber).selectedIndex == 0) {
           document.getElementById("vwquantity"+itemNumber).selectedIndex = 1;
        }
     }
     else
     {
       if (document.getElementById("vwcheckbox"+itemNumber).checked)
	    { 
	document.getElementById("vwquantity"+itemNumber).value = 1;
         }
		else
		 {
	document.getElementById("vwquantity"+itemNumber).value = 0;
		  }
      }
   }
   return true;
}