Is there a jQuery plug-in out there that can mimic those fixed position tabs people use on their sites? The tab is usually fixed on the left or right hand side of the web page.
UserVoice provides a script to submit feedback, which adds a tab to your page (they have a feedback tab on their own page if you need an example).
Stack Overflow used UserVoice some time ago.
you can simply position an element with css by using "position: fixed; top: xy px; left: 0 px;"
by clicking on the image or the element you can load your backend system. For example with jQuery UI Dialog.
hope I'd understand your question right.
Here you go, shameless plug, but I created this one: http://wpaoli.building58.com/2009/09/jquery-tab-slide-out-plugin/
Give it a try, might be what you are looking for.