Is it possible to autoclick a flash button? if so how would you auto click "select images" button on this web page:
http://johannesburg.gumtree.co.za/c-SelectCategory?CatId=9109
If the flash has an ExternalInterface callback, you would be able to trigger it using javascript. However if it's a website you don't have any control over, you'd be very hardpress triggering stuff like that.