function sendForm()
{
if (document.signUp.email.value == 0)
	{
	alert('please enter a valid email address - thanks');
	document.signUp.email.value = '';
	}
	
	else
	{
	document.signUp.email_address.value = document.signUp.email.value;
	document.signUp.referring_page.value = document.location;
	document.signUp.submit();
	}
}