function ContactUsValidator(form) { 
	if (form.name.value == '') {
		alert('Please enter your Name.');
		form.name.focus();
		return false;
	}
	
	var x = form.email.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9])+$/;
	
	if (filter.test(x) == false) {
		alert('Please enter a valid email address.');
		form.email.focus();
		return false;
	}


	if (form.comments.value == '') {
		alert('Please enter your Comments.');
		form.comments.focus();
		return false;
	}
	
	form.Submit.disabled = true; 
	return true; 
}