Thread:Extension talk:CategoryTree/How to keep CategoryTree stayed opened after going back

When I am going down in one category and subcategories (depth 5-6), after loading the specified category and then hitting the "back" button on the browser, the category tree is folded again. Is there any chance the tree stays opened? Please reply ASAP... How to keep noded expaneded even after clicking back button in browser.Any code changes to be done in Categorytree extension?