[Javascript] "Not Implemented" Error in IE -- Firefox is fine

[Claude Schneegans]

I get no error under IE 6.
Must be some "new feature" of IE7?

Any way, personnaly I find the document.forms['aspnetForm'] notation 
only useful when the form name is in a variable.
with constants, document.forms.aspnetForm looks cleaner, and 
document.aspnetForm should work as well