Css dropdown menu not function

I try to setup a Css dropdown menu, when the mouse over the main category is ok, but cannot point the the subcategory. is the Css problem or need do some modification :no:

The drop down doesn't work at all in my IE9 and Firefox.

Since you also have a side flyout, is there perhaps a conflict in the classes/categories_ul_generator? It's been awhile since I've use either of these flyouts/dropdowns, but they might have separate files. Could also be some setting issues, possibly in it's css, as I had a similar problem when testing awhile back where the drop down disappeared when trying to get to it.

Also, why the side-flyout if you're planning on a drop down? Usually, in this case, the side categories are used normally, more like a breadcrumb.

You might consider the new Mega Menu as on the Abbington, Cambridge and Supremo free templates. If you're going to use the side flyout you might just hand-build some of your important categories in to it, and include other good stuff.

Also, there is a support thread for this drop down in the All Other Contributions forum, may get good help there.

I am making a Toy web site, my boss want me doing like yoyo
the category is in the top , and different sorting on the left. that is what I want to do. or is any similiar template that I can use or modify.

Yoyo is a nice looking site, but I didn't see it having a top drop down and a side fly out. Just normal side categories.

BTW, zencart has a similar dynamic filter/layered navigation mod for the side which you can see on my demo here (click on a page to get past homepage to see filter):

http://www.webdivision.prommart.com/zencart-demo/index.php?main_page=index&template_switch_id=barebones_2

Templates: more free templates are coming out with drop downs, see these:

http://www.zen-cart.com/showthread.php?197349-Cambridge-Pro-Template-Support-Thread - only a few days old

http://www.zen-cart.com/showthread.php?194737-Abbiamo-Supremo-Support-Thread

BTW, I've read how "the boss" can really mess things up....often not really knowing what they are doing. ;)

But they are the boss.