Ext.onReady(function(){

    var ds = new Ext.data.Store({
        proxy: new Ext.data.ScriptTagProxy({
            url: 'http://extjs.com/forum/topics-remote.php'
        }),
        reader: new Ext.data.JsonReader({
            root: 'topics',
            totalProperty: 'totalCount',
            id: 'post_id'
        }, [
            {name: 'title', mapping: 'topic_title'},
            {name: 'topicId', mapping: 'topic_id'},
            {name: 'author', mapping: 'author'},
            {name: 'lastPost', mapping: 'post_time', type: 'date', dateFormat: 'timestamp'},
            {name: 'excerpt', mapping: 'post_text'}
        ])
    });

    // Custom rendering Template
    var resultTpl = new Ext.XTemplate(
        '
',
            '
{lastPost:date("M j, Y")}
by {author}{title}
',
            '{excerpt}',
        ''
    );
    
    var search = new Ext.form.ComboBox({
        store: ds,
        displayField:'title',
        typeAhead: false,
        loadingText: 'Searching...',
        width: 570,
        pageSize:10,
        hideTrigger:true,
        tpl: resultTpl,
        applyTo: 'search',
        itemSelector: 'div.search-item',
        onSelect: function(record){ // override default onSelect to do redirect
            window.location =
                String.format('http://extjs.com/forum/showthread.php?t={0}&p={1}', record.data.topicId, record.id);
        }
    });
});