ajax 笔记--二级联动

function changeXq(obj){var xn = $(obj).val();var url = url;$.post(url,{"xn":xn},function(result){var option = "";$("#xq").empty();$("#xq").append("<option value='0'>--请选择--</option>");$.each(result,function(key,value){option+="<option value='"+value.xq+"'>"+value.xqmc+"</option>"});$("#xq").append(option);},'json');}