Do you have Eclipse set up to show jsHints?  There are some warnings here: unused variables on lines 672 & 673 (innerPanel is re-declared below), and another on line 899.  Check out the info on [setting up Eclipse for Cesium](https://github.com/AnalyticalGraphicsInc/cesium/wiki/Contributor%27s-Guide#set-up-eclipse) and then look for the little yellow exclamation marks that jsHint puts alongside the code.