[TYPO3] Sub-Templates?

[Amir M.]

JoH wrote:
>>If you have done it like this:
>><div class="header">...</div>
>>with
>>.header { background-image:url(myimage.jpg); }
>>you have no chance to replace the image with typo, except you use
>>different CSS-files.
> 
> 
> Well - actually there are some chances ;-)
> This is one of them:
> You can replace the CSS style dynamically in your header by using the
> IMG_RESOURCE element.
> There you can adress the background-image property and fill in your
> dynamically created images:
> Don't know the exact way of doing this in TV but the default typoscript
> would be something like this:
> 
> page.headerData {
>     123 = IMG_RESOURCE
>     123 {
>         file {
>             import = uploads/media/
>             import.data = levelmedia:-1, slide
>             import.listNum = 0
>             width = 456
>             height = 123
>         }
>         stdWrap.required = 1
>         stdWrap.wrap (
> <style>
>     .header {
>         background-image:url(|);
>     }
> </style>
> }
>     }
> }
> 
> Replace 123 und 456 with the correct values for your image.
> Now you just have to upload the desired banner into the "media" field of the
> corresponding section's master page and it will be shown there and on any
> subpage of this master.
> Not tested but should be working.
> 
> Joey
> 

Interesting.  It sounds simple, I will try this and hopefully it works. 
   But may I ask, where is the "media" field for a page?  Sorry if this 
is a noob question, but I've been looking and I can't find any such thing.