function validate_form ( )
{
    valid = true;

    if ( document.contact_form.name1.value == "" )
    {
        alert ( "Please fill your First Name." );
        valid = false;
    }
	 if ( document.contact_form.name2.value == "" )
    {
        alert ( "Please fill your Last Name." );
        valid = false;
    }
	 if ( document.contact_form.email.value == "" )
    {
        alert ( "Please fill your Email Address." );
        valid = false;
    }
	
    return valid;
}