function validateForm(aform)
		{
			//check for blank fields
			if (aform.ddlProducts.selectedIndex == 0){
				alert( 'Please select an Item to Purchase' );
				return false;
			}
			//check for business rules
			else if (Left(aform.f_model.value,1).toLowerCase() == "v" || Left(aform.f_model.value,1).toLowerCase() == "d" || Left(aform.f_model.value,1).toLowerCase() == "w" || Left(aform.f_model.value,1).toLowerCase() == "t" )
			{
			    if(aform.f_model.value.toLowerCase() == "da3831")
			    {
			        return true;
			    }
				alert( 'Steal-Safe Security and Executive Safe Keys Cannot be Purchased Online\nPlease Contact consumerinfo@sentrysafe.com' );
				return false;
			}
			else if (Left(aform.f_model.value,1).toLowerCase() == "p" || Left(aform.f_model.value,1).toLowerCase() == "r" || Left(aform.f_model.value,1).toLowerCase() == "g" )
			{
				alert( 'Pistol/Ammo & Gun Safe Keys Cannot be Purchased Online\nPlease Contact consumerinfo@sentrysafe.com' );
				return false;
			}
			else if ( aform.f_model.value.toLowerCase() == "cs-3" || aform.f_model.value.toLowerCase() == "c1208" || aform.f_model.value.toLowerCase() == "c1212" || aform.f_model.value.toLowerCase() == "c1216" || aform.f_model.value.toLowerCase() == "us-1"  )
			{
				alert( aform.f_model.value );
				return false;
			}
			else if ( checkLockNum(aform) == true )
			{
			 		 if (aform.f_lock.value == "") {
			 			alert( 'Please enter a Lock Number!' );
						return false;
					 }
			}
			else if ( checkSerialNum(aform) == true )
			{
			 		 if (aform.f_serial.value == "") {
			 			alert( 'Please enter a Serial Number!' );
						return false;
					 }
			}	 
			else if ( aform.f_model.value == "" )
			{
			 		 if ( aform.f_serial.value == "" || aform.f_lock.value == "" )
					 {
			 		 alert( 'Please enter a Serial Number and a Lock Number!' );
					 return false;
					 }			
			}
			else
			{
				return true;
			}
		}