function validate_form ( )
{
    valid = true;

      
   if ( document.contact.NAME.value == "" )
    {
        alert ( "Please fill in the 'Full Name' text box." );
        valid = false;
    }
	   if ( document.contact.ADDRESS.value == "" )
    {
        alert ( "Please fill in the 'Address' text box." );
        valid = false;
    }
    
 if ( ( document.contact.GARDEN_INSPECTION[0].checked == false )
    && ( document.contact.GARDEN_INSPECTION[1].checked == false ) )
    {
        alert ( "Please choose your preference for a garden inspection." );
        valid = false;
    }


	
    return valid;
}