var otherProductOption = 16;	// Index of the 'other' option on products list.

function demoRequestValidator(theForm)
{

/*	Did we select a product? */
	if (theForm.Product_Requested.selectedIndex <= 0)
	{
		alert("Please select an option from the products list.");
		theForm.Product_Requested.focus();
		return (false);
	}
  
/*	If we selected 'other', did we provide details? */
	if (theForm.Product_Requested.selectedIndex == otherProductOption)
	{
		if (theForm.Custom_Demo.value == "")
		{
			alert("To order a customised demo, please identify the activity for a custom demo version.")
			theForm.Custom_Demo.focus();
			return (false);
		}
	}
	
/*	Did we enter our operating system. */
	if (theForm.Operating_System.selectedIndex <= 0)
	{
		alert("Please select an option from the operating systems list.");
		theForm.Operating_System.focus();
		return (false);
	}
	
/*	Did we enter our name? */
	if (theForm.Name.value == "")
	{
		alert("Please enter your name.");
		theForm.Name.focus();
		return (false);
	}

/*	Did we enter our title? */
	if (theForm.Title.value == "")
	{
    		alert("Please enter your title.");
		theForm.Title.focus();
		return (false);
	}
	
/*	Did we enter our phone number? */
	if (theForm.Phone.value == "")
	{
		alert("Please enter your phone number.");
		theForm.Phone.focus();
		return (false);
	}

/*	Did we enter our email? */
	if (theForm.Email.value == "")
	{
		alert("Please enter your email.");
		theForm.Email.focus();
		return (false);
	}

/*	Did we enter our organisation? */
	if (theForm.Organisation.value == "")
	{
		alert("Please enter the name of your organisation.");
		theForm.Organisation.focus();
		return (false);
	}

/*	Did we enter our department or branch? */
	if (theForm.Department_Branch.value == "")
	{
		alert("Please enter your department or branch (enter N/A if none).");
		theForm.Department_Branch.focus();
		return (false);
	}

/*	Did we enter our address? */
	if (theForm.Address.value == "")
	{
		alert("Please enter your address.");
		theForm.Address.focus();
		return (false);
	}

/*	Did we enter our referral? */
	if (theForm.Referral.selectedIndex <= 0)
	{
		alert("Please tell us how you found ASIS.");
		theForm.Referral.focus();
		return (false);
	}

	return (true);
}