easyui-combobox 中多选的默认值设置、获取多选值及JS包含字符串、删除字符串

<input id="education" name="education" class="easyui-combobox"
data-options="method:'get',valueField:'id',textField:'name',multiple:true,panelHeight:'auto',required:true,
url:'${ctx}',editable:false,
value:'aa',
loadFilter:function(data){
if(null==data) return [];
var dd = [];
dd.push({id:'aa',name:'不限'});
for(var i=0; i<data.length; i++){
dd.push(data[i]);
}
return dd;
}"/>

var education = $("#education").combobox('getValues');//获取多选值

//判断是否包含aa
function contains(arr) {
var i = arr.length-1;
// 从数组中判断str是否存在
while (i--) {
if (arr[i] === 'aa') {
return true;
}
}
return false;
}
//移除包含的字符串
function removeStr(arr) {
var arrNew = new Array();
//从数组中删除指定str
for(var i = 0; i < arr.length; i++){
if('aa' != arr[i]) {
arrNew.push(arr[i]);
}
}
return arrNew.toString();
}