Css / Javascript Menu - Chrome Positioning Problem

We have implimented a menu system that allows us to change a menus orientation from Vertical to Horizontal by just changing a single variable. It works very well. However, we have one problem only on the Horizontal display menu and then, only in Chrome. When we click a Horizontal menu heading we expect the menu items to drop down below the menu. However, they are appearing above the heading. The desired behavior as well as the wrong behavior can be seen on the attached two images. It works fine in IE and Firefox but Chrome displays the items wrong. This is an accordion menu. Each sub item is within the container of its parent. It is important that ALL existing behavior is still functional and working when you have completed this project. It does us no good to cure one behavior if we break another. Both the vertical and horizontal will be tested thoroughly prior to funding release. Thank you for your bid. Sincerely, Jay CompuMatter