var ds = new Ext.data.Store({
proxy: new Ext.data.ScriptTagProxy({
url: 'http://domain/search.php'
}),
reader: new Ext.data.JsonReader({
root: 'isi',
totalProperty: 'totalCount',
id: 't_id'
}, [
{name: 'id', type: 'int'},
{name: 'nama', type: 'string'}
]),
remoteSort: true
});
ds.setDefaultSort('nama', 'desc');
var combo = new Ext.form.ComboBox({
store: ds,
displayField:'nama',
typeAhead: true,
mode: 'local',
triggerAction: 'all',
emptyText:'Select a Name...',
selectOnFocus:true
});
combo.applyTo('objId');
and create your object id in your html
<div id='objId' name='objId'></div>