$.ajax({
		   type: "POST",
		   url: root + "/xxx,
		   data: requestData,
		   dataType: "json",
		   success: function(data){

				// 清空列表
				$("#formOpinion #listLeft").empty();

				$.each(data,
						function(i, $data) {
							var $option = $("<option name='opinion.tag' value="
									+ $data.code + $data.name + ">" + $data.code
									+ $data.name + "</option>");
							// 绑定数据到listLeft
							$("#formOpinion #listLeft").append($option);
						});
			
		   }
		});