Thread:Project:Support desk/Dynamic header image/reply

You can use css perhaps.

For example on vector (in mediawiki:Vector.css) body.ns-1 #mw-head {background-image: url( http://somewhere/someimage.png );} Would change the background at the very top of the page to someimage.png for any talk page (talk is namespace 1. All namespaces have there own number. The main (article) namespace is namespace 0).

You can also do per-page changes: body.page-Extension_Logotipo #mw-head {background-image: url( http://somewhere/someimage.png ); } would change it on extension:Logotipo only.

If you want to do something in a template, you'd probably need to create a custom extension.