$(document).ready(function () {
    $('#raceId').change(function () {
		    var rid = $(this).val();
				var rurl = 'ajax/fit.race.metier.ajax.php';
				$.ajax({
				    type: 'post', 
						timeout: 10000, 
						url: rurl,
						data: {'rid':rid}, 
						dataType: 'html', 
						error: function (a, b) { 
						    alert('Sorry, request timeout, click confirm to reload this page.');
								window.location.reload(document.URL);
						}, 
						beforeSend: function () { 
						    $('#metierId').attr('disabled', true); 
								$('#metierId').html('<option value="0">Please waiting...</option>'); 
						},
						success: function (data) { 
						    $('#metierId').attr('disabled', false);  
								$('#metierId').html(data); 
						}
				});
		});
});