spring - Dynamically change select tag in a view -

i have following model, major, university , application. when creating new application, want majors list withing application change dynamically based on choose of university field.

i used dojo in code, it's not working..

create application tag

<?xml version="1.0" encoding="utf-8" standalone="no"?> <div xmlns:c="http://java.sun.com/jsp/jstl/core"     xmlns:field="urn:jsptagdir:/web-inf/tags/form/fields"     xmlns:form="urn:jsptagdir:/web-inf/tags/form"     xmlns:jsp="http://java.sun.com/jsp/page"     xmlns:spring="http://www.springframework.org/tags" version="2.0">     <jsp:directive.page contenttype="text/html;charset=utf-8" />     <jsp:output omit-xml-declaration="yes" />     <spring:url value="/applications/majorsbyuniversity?university="         var="ajax_url" />     <script type="text/javascript">         // dom ready         dojo.addonload(function() {             var universityid = dijit.byid("_university_id");                                         //var majors = dijit.byid("_majors_id");             var _fragment_item_ = dojo.byid("_fragment_item_");             dojo.connect(universityid, "onchange", function(evt) {                 var url = "${ajax_url}?university=" + universityid.get("value");                 dojo.xhrget({url : "applications/majorsbyuniversity", timeout : 2000, content : {                     universityid : dojo.trim(universityid.value)}, load : function(result) {                         _fragment_item_.innerhtml = "" + result;                         spring.adddecoration(new spring.elementdecoration({                             elementid : '_major_id',                             widgettype : 'dijit.form.filteringselect',                             widgetattrs : {                                 hasdownarrow : true                             }                         }));                     }                 });             });         });      </script>     <form:create id="fc_eu_gju_domain_application"         modelattribute="application" path="/applications"         render="${empty dependencies}" z="ki5rm14j9r0tdsebqiwg5a6bvnw=">         <field:input field="status" id="c_eu_gju_domain_application_status"             z="v09rnw9oqd32sgv0gnb/tcg4nly=" />         <field:select field="university"             id="c_eu_gju_domain_application_university" itemvalue="id"             items="${universitys}" path="/universitys"             z="o6m+l2bfays9ilr85jmqyqoe3jg=" />          <div id="_fragment_item_">             <field:select field="majors" id="c_eu_gju_domain_application_majors"             itemvalue="id" items="${result}" multiple="true" path="/majors"             z="stoc0qae7c9u/chqpb1wizsn1n0=" />         </div>      </form:create>     <form:dependency dependencies="${dependencies}"         id="d_eu_gju_domain_application" render="${not empty dependencies}"         z="zafd2zq80ivisnmknrmkavlpqqy=" /> </div> 

application.java

@roojavabean @rootostring @roojpaactiverecord public class application {      private string status;       @manytoone     private university university;      @manytomany(cascade = cascadetype.all)     private set<major> majors = new hashset<major>(); } 

applicationcontroller.java

@requestmapping("/applications") @controller @roowebscaffold(path = "applications", formbackingobject = application.class) public class applicationcontroller {     public @responsebody list<major> majorsbyuniversity(@requestparam long universityid) {          list<major> majors = major.findmajorsbyuniversity(university.finduniversity(universityid)).getresultlist();         return majors; }