I had this working a couple of times but when I try and edit the define main page it just drops the code for the background image. Can't figure why it worked a couple of times then just drops it.

Here is the code I'm trying to use in the define main page in the html editor
Code:
<div style="background-image: url("http://xxxxxxxxxx/images/parchment.png");">
<br />
I guess I should be using css for this but couldn't figure out what to edit for it