Node switch function not working in IE7

Hi All,

I've found a bug when working with IE7, version 7.0.5730.11

When I'm trying to call the switch function in IE7, it throws an error indicating that it is expecting a case statement.  Until/unless M$ fixes this issue, I'd like to suggest that the function Mif.Tree.Node.switch be named something else.  A snippit of my code is provided below:

for(var i=0;i<node_list.length;i++) {
   node_list[i].switch('unchecked');
}

The error (verbatim) from IE is "Expected identifier"
The same piece of code works flawlessly in Firefox.
Yes, IE sucks, but my employer is insisting on IE compliance