I'd like to display some photos with flickr on my website which could change dynamically
<iframe align=center src=http://www.flickr.com/slideShow/index.gne?user_id=my_id&tags=Grenoble frameBorder=0 width=500 scrolling=no height=500></iframe>
In this example my tag is Grenoble (a city). What I'd like is to be able do change that tag (to New York or Chicago for example) even if I don't have pictures with this tag.
(The aim of this is to display photos according to a city variable).