将工具提示应用于Raphael中的一组，而不是每一方

Here is a JS Fiddle which shows the tooltip on hovering the cube. The tooltip is invoked whenever I hover over each face wherein I want the hover to appear only once on the whole cube. I prefer if I could use the same plugin which I have used in the fiddle, in-case if it is not possible, other solutions are also welcome. which shows the tooltip on