[Typo3] how can i deal with the menu format controlled by a Javascript

[zsl vincent]

Hi,
Question1: As you can see here below,that is for one menu item,at the 
same time there is a text (menu item 1)and a gif (button_arrow.gif) for 
one menu item.of course i will substitute the text(menu item 1)to my 
page header when i write the typoscript,but what can i do with the 
.gif(button_arrow.gif)
-----------------------------------------------------------------
<tr>
           <td width="10">&nbsp;</td>
           <td width="5">&nbsp;</td>
           <td width="109" class="unseltoc" height="20" 
onClick="javascript:show('Layer1');"><a href="#" class="unseltoc">menu 
item 1</a></td>
           <td width="14" align="right" 
onClick="javascript:show('Layer1');"><a href="#"><img 
src="images/button_arrow.gif" width="14" height="14" border="0" 
alt="arrow button" title="arrow button"></a></td>
           <td width="5">&nbsp;</td>
</tr>
---------------------------------------------------------------------
Question2: the format of the subpages of Menu item 1 are controlled by 
the Javascript that you can find in the html above.what can i deal with 
that in the typo3?
-------------------------------------------------------------------
<div id="Layer1" style="position:.......
     //the content inside is in charge of the format of the subpages
  ...
</div>
-------------------------------------------------------------------