javascript - jquery select2 append selected item? -

i'm trying select item multi select jquery select2 ajax

html

<select name="schools" id="schools" multiple='multiple'>   <option value="-1000">select all</option>   <option value="35102907">org1</option> </select> 

js

$("#schools").select2({   ajax: {     url: "ajax_controller.php",     datatype: 'json',     data: function (params) {         return {             a: 'getschoollist',             c: 'model_milk_contract',             p: [params.term],             cs: csrf         }     },     processresults: function (response) {       return {          results: $.map(response, function(obj) {             return { id: obj.org_code, text: obj.org_name };          })       }     }   } 

});

but when 1 item selected, jquery says in console:

uncaught typeerror: failed execute 'appendchild' on 'node': parameter 1 not of type 'node'.

then tried find problem , after time found in below line of jquery core, ret[i] must node object, gets array of node objects , if pass ret[i][0] function, works!

fragment.appendchild( ret[i] ); 

what's problem?!

finaly found problem: jquery old , version 1.7.1 while select2 version 4 needs min jquery 1.8. thanks...