new prev/next keyboard shortcuts; better IE compatibility
new prev/next keyboard shortcuts; better IE compatibility

git-svn-id: 6ed4032d55824b87387cea7ca50eb066630d6e73@72 c93d8143-eb44-0410-8798-7b17b0fd9f9b

pagojo/rethoth,rgrove/thoth,pagojo/rethoth,rgrove/thoth,pagojo/rethoth