backplane-import/backplanejs — Issue #101: Calls to UX.addClassName when on FF in XHTML mode, cause a script error
Author: backplane-import
Created: 2011-10-15 03:19:32+00:00
State: open
Labels: priority-medium, type-defect

### Imported from backplanejs Google Code [issue 101](http://code.google.com/p/backplanejs/issues/detail?id=101).

Reporter
markbirbeck

Date
10 Sep 2010 1:32:34 AM UTC

What steps will reproduce the problem?
1. Run a form with a select1.
2. Move the mouse over the select1.

What is the expected output? What do you see instead?
If Firebug is open there should be no errors. Instead we get an error each time the mouse is moved:

String contains an invalid character" code: "5
element.classList.add(classString);