Fix issue with IE6 and addNamespace.
Fix issue with IE6 and addNamespace.

BUG=66

git-svn-id: d6d72561c430d2fe9dc5ddeb0f646cbdb8f9f0b9@72 fd59bba8-8519-0410-9389-e36bf2bdbbd6

githubashto/explorercanvas,arv/ExplorerCanvas,jevgen/explorercanvas,peipe/explorercanvas,stcherenkov/explorercanvas,githubashto/explorercanvas,renerubio/explorercanvas,sandeeproop/explorercanvas,jevgen/explorercanvas,renerubio/explorercanvas,petabytekr/explorercanvas,sebs/explorercanvas,jonessieka/explorercanvas,JonazMartinez/explorercanvas,harrylhawkins/explorercanvas,stcherenkov/explorercanvas,afif2829/explorercanvas,KingPsychopath/explorercanvas,TechmanDesign/explorercanvas,craftica/explorercanvas,petabytekr/explorercanvas,Burningm/explorercanvas,amosworker/ExplorerCanvas,Burningm/explorercanvas,harrylhawkins/explorercanvas,amosworker/ExplorerCanvas,arv/ExplorerCanvas,JonazMartinez/explorercanvas,tqtiwvfdn/explorercanvas,thdtjsdn/ExplorerCanvas,peipe/explorercanvas,jiangjunt/ExplorerCanvas,sebs/explorercanvas,rsstation/explorercanvas,qingyangmoke/explorercanvas,thdtjsdn/ExplorerCanvas,afif2829/explorercanvas,KingPsychopath/explorercanvas,rsstation/explorercanvas,tqtiwvfdn/explorercanvas,craftica/explorercanvas,jiangjunt/ExplorerCanvas,jonessieka/explorercanvas,qingyangmoke/explorercanvas,sandeeproop/explorercanvas,TechmanDesign/explorercanvas