Need help for adding an extra image in submenu category

[thebeautybliss]

1) Script Title: Bullet List Accordion Menu

2) Script URL (on DD): http://www.dynamicdrive.com/dynamici...enu-bullet.htm

3) Describe problem:
1:- I have tried putting it on my website as a test. changed the appearance a bit.. works very well but the the whole page shakes when the 1st or 2nd tab of the menu on my site collapse or expand! but that too only sometimes*strange*
(using google chrome).. any idea what can be the cause?
i have put the test menu here: http://www.thebeautybliss.com/

2:- In this menu for submenu category, e.g menu gallery under the Css drive tab has no image icon.. can i put an image for that category too. i would like to place a different image then the arrow.. may be a + sign image. if its possible can you please help me out with the code please!
Thank you,
-Monica

----------------- edit--------------------------
i noticed the page shakes only when one of two tabs i,e either 1st or 2nd tab is expanded n i click on other to expand.
means if i only expand 1st tab.. page doesnt shake
now 1st tab is expanded if i now click on 2nd tab.. page shakes
click on 1st tab (kept 2nd tab open).. page shakes
if i consider a case when the 2nd tab is expanded, i first click on 2nd tab again to collapse it first n then click on the 1st tab to expand--page doen't shake!

i hope i could convey my thoughts properly! *nervous*

[thebeautybliss]

somehow that shaky-ness has gone itself..
now i only need a bit help at adding an image for submenu categories.
Thanks in advance, n waiting for responce