google maps v3 marker info window on mouseover

Question

I have scoured stackoverflow and other forums including the google maps v3 api docs for an answer but I cannot find how to change the event that fires the marker info window from click to mouseover in the files I am working with.

I am working with a demo from the google library that includes a fusion table layer.

You zoom into the clusters and see the small red circle markers for locations. You have to click to reveal an info window. I wish to rollover to reveal the info window.

My demo is here: http://www.pretravelvideo.com/gmap2/

The functions.js file does most of the work here: http://www.pretravelvideo.com/gmap2/functions.js