function check_contact_form()
{
	var first = document.forms.contact_form.form_first_name.value;
	var last = document.forms.contact_form.form_last_name.value;
	var email = document.forms.contact_form.form_email.value;
	var comment = document.forms.contact_form.form_comment.value;
	var name_regex = /^[a-zA-Z\s-\.]+$/;
	//var email_regex = /^([\w]+)(.[\w]+)*@([\w]+)(.[\w]{2,3}){1,2}$/;
	var email_regex = /.+@.+\..+/ ;
	var correct = true;

	if (first == null || first == "")
	{ 
		alert("Please enter your first name.");
		document.forms.contact_form.form_first_name.focus();
		correct = false;
	}
	else if (last == null || last == "")
	{ 
		alert("Please enter your last name.");
		document.forms.contact_form.form_last_name.focus();
		correct = false;
	}
	else if (email == null || email == "")
	{ 
		alert("Please enter your email address.");
		document.forms.contact_form.form_email.focus();
		correct = false;
	}
	else if (comment == null || comment == "")
	{ 
		alert("Please enter a comment or question.");
		document.forms.contact_form.form_comment.focus();
		correct = false;
	}
	else if(!email_regex.test(email))
	{
		alert("Please enter a valid email address.");
		document.forms.contact_form.form_email.focus();
		correct = false;
	}
	else if(!name_regex.test(first))
	{
		alert("Letters only in name, please.");
		document.forms.contact_form.form_first_name.focus();
		correct = false;
	} 
	else if(!name_regex.test(last))
	{
		alert("Letters only in name, please.");
		document.forms.contact_form.form_last_name.focus();
		correct = false;
	}
	
	return correct;
} // function check reg form