Hello World Ext Combo

gistfile1.js

Ext.onReady(function(){
	var helloWorld = new Ext.form.Label({
		text: 'Pick a country to say Hello to!'
		,renderTo: 'page'
    });

    var dropdown = new Ext.form.ComboBox({
    	store: new Ext.data.ArrayStore({
        	id: 0,
	        fields: [
	            'place',
	            'displayText'
	        ],
        	data: [['America', 'Ni Hao Mei Guo!'], ['China', 'Ni Hao Zhong Guo!'],['England', 'Ni Hao Ying Guo!'], ['Hong Kong', 'Ni Hao Xiang Gang!']]
    	})
    	,mode: 'local'
    	,valueField: 'displayText'
    	,displayField: 'place'
    	,listeners: {
    		select: function(comboBox,record,index){
    			helloWorld.setText(comboBox.getValue());
    		}
    	}
    	,renderTo: 'page'
    	,editable: false
    	,triggerAction: 'all'
    });

});