Ext操作DOM元素之insertHtml

Ext.get('msgPanel-innerCt').insertHtml('afterBegin','
hello
');

//写入dom元素id
Ext.get('id'); 

    /* 
     * 第一个参数有4个可选值:
     * beforeBegin: <HERE><div>Contentsdiv>
     * afterBegin: <div><HERE>Contentsdiv>
     * beforeEnd: <div>Contents<HERE>div>
     * afterEnd: <div>Contentsdiv><HERE>
     */
     Ext.dom.Helper.insertHtml('插入到哪里','htmlString');