This is for a background on the actual part where the words are located

<script language="javascript" type="text/javascript">
//<![CDATA[
document.getElementById("content_view").style.background =
"url('http://spacename.wikispaces.com/space/showimage/picturename.jpg') center center repeat scroll;";
//]]>
</script>
In the real thing, get rid of the line break between background = and "url





This is the background for the part of the page that doesn't have color on it.
 
<script language="javascript" type="text/javascript">
//<![CDATA[  document.getElementsByTagName("body").item(0).style.backgroundImage ="url(/space/showimage/imagename.jpg)";
//]]>
</script>


Just Replace picturename with the name of your image. And it shouldn't be in bold or underlined.
You have to have image already uploaded.

P.S. You have to upload a picture from your computer first. The type of picture may change too from
jgp or gif to something else, so make sure you have that right


Here is a page with both examples in it.