#4304 HTML5 code (some borders not perfect)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33748 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
small fix for IndexOf (ArrayOutOfBounds)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33750 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e