什么是在Dijit AccordionContainer中以编程方式打开窗格的最佳方式

I am trying open & close accordion panes programatically. Here is the simplified version of my code. Even though I set the first pane's selected to false and and second pane's selected to true, only the first pane opens when it loads on the browser (FF3).I am trying open & close accordion panes progra