Changing background image of another object

hey guys,
i’m trying to change the the background image of a table using CSS classes and onMouseOver command.

i figured out how to change the image if i move the mouse on that image:

onMouseOver="this.className='table1_news'"

now i need to know ehat to write instead of this so that when i move the mouse over the button that it changes the classname of the table. Something like:

onMouseOver="Table1.className='table1_news'"

just that this one doesn’t work :fight: I got the ID of the table set to Table1. Do i need to do anything else?

help me please