E Gilmore wrote:... Works with: MSIE6...
Nope. I'm using IE 6 at work, and this doesn't work. It can't because you have no element with id of "nav," so the function is failing on line 5. (I'm guessing you want to assign an id to each ul that's hidden, like ul id="roomNav" and ul id="ratesNav" and then pass that id to the function so it can work its magic on that element.)
In any case, note that display none is applied to li ul (the ones you want to assign ids to), so all you need to do is display that ul and the children will display as well. You do no need to iterate through them.
But to do that, if you change that ul's class to "over," then you will need to add
li ul.over to the list for "the magic" { display: block; }.