[TYPO3] foldout Menu by Typoscript,Javascript,Php

[Nirmalya]

Hi all,
I've developed a left navigation (menu) in which clicking on 
topLevel(not hyperlinked)sublevel is displaying.
BE page structure is like below
topLevel1
     subLevel1_1
     subLevel1_2 (say page id="10")
     subLevel1_3
topLevel2
     subLevel2_1
     subLevel2_2(say page id="20")
     subLevel2_3
I am in page id="10" then searched for "subLevel2_2" ,here topLevel1 is 
opened.
Now from  searched result i've clicked on "subLevel2_2" now i m in page 
id="20"

Where topLevel1,topLevel2 both is opened instead of opening only 
topLevel2.If i click on any one topLevel both of the subLevel is closed.

OnClick:subLevel display & hidden is controlled by javascript.
So any clue where the error is ...
Thank you,
nirmalya.