Using Html Id in ExtJS4

I am new to 开发者_开发技巧ExtJS4.May i know how to get html Id in ExtJS4.If you have a sample please share with me.

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In ExtJS4 you can get dom node by it's id using:

Ext.DomQuery.selectNode('#example_div');

or using oldschool js:

document.getElementById('example_div');

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You can try

var elDom = Ext.getDom('example_div');

I have not used it but found it in the docs.