on Rollover

[liamloveslearning]

hi everyone, I have this script where my button changes to offline/online depending im on my live chat console

 

<!-- BEGIN Comm100 Live Chat Button Code --><div><div id="comm100_LiveChatDiv"></div><a href="http://www.comm100.com/livechat/" onclick="comm100_Chat();return false;" target="_blank" title = "Live Chat Live Help"><img id="comm100_ButtonImage" src="http://chatserver.comm100.com/BBS.aspx?siteId=18077&planId=85" border="0px" alt="Live Chat Help" /></a><script src="http://chatserver.comm100.com/js/LiveChat.js?siteId=18077&planId=85" type="text/javascript"></script></div><!-- End Comm100 Live Chat Button Code -->

 

is it possible to have a colour rollover on this as opposed to 2 static images?