Adjusting the lib.collapse() function to work in IE6 (the css rule "[collapsed]" won't work in IE6). Added CSSStyleRule duck-type detection.
Adjusting the lib.collapse() function to work in IE6 (the css rule "[collapsed]" won't work in IE6). Added CSSStyleRule duck-type detection.

git-svn-id: cc12c73f837f4c86aedaac3e81d294eae78e8bd7@5831 e969d3be-0e28-0410-a27f-dd5c76401a8b

darwin/firebug.lite