I think I have seen a snippet in the forums that can do this...but can’t seem to recall its name...anyway, you can also do this easily with TVs. The image will be inserted as part of the content using the first method and as a background image using the second.
First Method
1. Create an image TV and associate it with your sites template(s), i.e. the templates your resources (documents) are using
2. In your site’s template call the TV where you want it to appear, i.e. where your banner is
So, something like:
<img src="[*nameOfYourImgTV*]" />
3. Then, when editing the document, say "About", just choose the image you want using the TV
Second Method
If you prefer to call the image as a background image you can instead create a text TV where you will write the name of the css class you want associated with the respective pages.
so, something like:
<div class="[*nameOfYourTextTV*]"></div>
3. Then when editing the documents, enter the name of the class you want for that page. The rest of the magic is in your CSS.
Hope this helps
cheers/k