I'm using [JQuery Knob](http://anthonyterrien.com/knob/) to make some cool graphs and it's working perfectly. But I have one problem: I want to make the display number between the graph have a '%' symbol concatenated. but I just cant seem to make it work. Modifying the input through jquery wont do it, and I've tried reading into the code of the library but with no luck. Has any one else had this problem before?