getAttribute() now returns a null object instead of an empty string when an attribute does not exist, so expand shortcuts like getAttribute().toUpperCase() to the longer form to prevent errors. r=blakeross@telocity.com sr=jst@netscape.com git-svn-id: svn://10.0.0.236/trunk@108106 18797224-902f-48f8-a5cc-f745e15eee43