function validate_form ()
{
    valid = true;

    if ( document.tee_time.name.value == "")
    {
        alert ( "Please Type your Name" );
        valid = false;
    }
	
	else if ( document.tee_time.telephone.value == "")
    {
        alert ( "Please type your Contact Telephone Number" );
        valid = false;
    }
	
	else if ( document.tee_time.email_address.value == "")
    {
        alert ( "Please type your Email Address" );
        valid = false;
    }
	
    return valid;
}