function validate_form ( )
{
	valid = true;
	alert_msg = "In order to submit this form, you must fill in values for the following items:\n";

        if ( document.signup_form.first_name.value == "" )
        {
                alert_msg = alert_msg+'First Name, ';
                valid = false;
        }

        if ( document.signup_form.last_name.value == "" )
        {
                alert_msg = alert_msg+'Last Name, ';
                valid = false;
        }

        if ( document.signup_form.state.value == "" )
        {
                alert_msg = alert_msg+'State, ';
                valid = false;
        }

        if ( document.signup_form.email.value == "" )
        {
                alert_msg = alert_msg+'Email, ';
                valid = false;
        }

	if ( valid == false )
	{	
		alert ( alert_msg );
	}
        return valid;
}