How do I make the left navigation menu open the first time the user comes to the page?

It's a module of Type Menu created from the Module Manager. I played with all the settings trying to make this seemingly simple thing happen but I haven't had any luck. I'm using the default template of joomla! 2.5


On Beez 20 template, the position- 4 is auto show/hide. Please published your menu module in position-7 instead of position-4