function validate_form ()
{
    valid = true;

    if ( document.contact.name.value == "" )
    {
        alert ( "Name is required." );
        valid = false;
    }
	 if ( document.contact.email.value == "" )
    {
        alert ( "Email Address is required." );
        valid = false;
    }
	 
	if ( document.contact.subject.value == "" )
    {
        alert ( "Subject is required." );
        valid = false;
    }
	if ( document.contact.comments.value == "" )
    {
        alert ( "Comments are required." );
        valid = false;
    }
	 if ( document.contact.security.value == "" )
    {
        alert ( "Please complete the security test." );
        valid = false;
    }
	 	
	return valid;
}