FIXED-POSITION TOP MENU AND SIDE NAV BAR

Using the resize jQuery function froze up Firefox. So, I am using document.ready instead.
Enhancement for: http://eden.sahanafoundation.org/ticket/1448
Enhancements from discussion(https://groups.google.com/forum/#!topic/sahana-eden/ZyD7HK1Jy0I ):
1. Fixed Top Menu
2. Fix Left Side Navigation only if it is smaller than the screen on load.

Update: Does not freeze in firefox anymore on Lubuntu, so I will use resize.