Event.observe( document, 'dom:loaded', function (event) { 
        		
		
	Event.observe( 'cardform', 'submit', function (event) { 
	  //alert( $('cardform').night_phone_a.value );
	  $('cardform').os2.value = $('cardform').night_phone_a.value + $('cardform').night_phone_b.value + $('cardform').night_phone_c.value;
	 
	 
	});
		
		
		
        new Validation('cardform');
		
	
	});