页面代码如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="https://www.jb51.net/<%=basePath%>"> <title>My JSP 'city.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link type="text/css" href="https://www.jb51.net/styles.css"> --> <script type="text/javascript" src="https://www.jb51.net/js/jquery-1.7.2.min.js"></script> <script type="text/javascript"> $(document).ready(function(){ //省 $.ajax({url:"xml/City.xml", success:function(xml){ $(xml).find("province").each(function(){ var t = $(this).attr("name");//this-> $("#DropProvince").append("<option>"+t+"</option>"); }); } }); //市 $("#DropProvince").change(function(){ $("#sCity>option").remove(); $("#sArea>option").remove(); var pname = $("#DropProvince").val(); $.ajax({url:"xml/City.xml", success:function(xml){ ///查找<province>下的所有第一级子元素(即城市) $(xml).find("province[name='"+pname+"']>city").each(function(){ var city = $(this).attr("name");//this-> $("#sCity").append("<option>"+city+"</option>"); }); ///查找<city>下的所有第一级子元素(即区域) var cname = $("#sCity").val(); $(xml).find("city[name='"+cname+"']>area").each(function(){ var area = $(this).attr("name");//this-> $("#sArea").append("<option>"+area+"</option>"); }); } }); }); //区 $("#sCity").change(function(){ $("#sArea>option").remove(); var cname = $("#sCity").val(); $.ajax({url:"xml/City.xml", success:function(xml){ ///查找<city>下的所有第一级子元素(即区域) $(xml).find("city[name='"+cname+"']>area").each(function(){ var area = $(this).attr("name");//this-> $("#sArea").append("<option>"+area+"</option>"); }); } }); }); }); </script> </head> <body> <form> <div> <select> <option>请选择</option> </select> <select> <option>请选择相应市</option> </select> <select> <option>请选择相应区</option> </select> </div> </form> </body> </html>
效果图如下：
