function frm_top_submit()
{
	with(document.frm_top_sub_email)
	{
		if(trim(txt_email.value)!="")
		{	
			if(!sValidateMailAddress(trim(txt_email.value)))
			{
				alert("Please enter valid email address. Format:email@domain.com");
				txt_email.select();
				txt_email.focus();
				return false;
			}
		}
		else
		{
			alert("Please enter email address for news letter sign up.");
			txt_email.select();
			txt_email.focus();
			return false;
		}
	}
	return true;
}