function validate_form()
{
	validity = true;		
	if (!check_empty(document.form.NAME.value))
	{
		validity = false;
		alert('Name field is empty!');
	}
	if (!check_email(document.form.EMAIL.value))
	{
		validity = false;
		alert('Email address is invalid!');
	}
	if (validity)
	{
		alert ("Needed entries have been verified. "
				+ "Your form is now being passed to your browser's "
				+ "Mail Delivery Sub-System.");
	}
	return validity;
}

function check_empty(text)
{
	return (text.length > 0);		
}

function check_email(address)
{
	if ((address == "") || (address.indexOf ('@') == -1)
		|| (address.indexOf ('.') == -1))
	{
		return false;
	}
	return true;
}

function check_url(address)
{
	if ((address == "") || (address.indexOf ('http://') == -1)
		|| (address.indexOf ('.') == -1))
	{
		return false;
	}
	return true;
}