jQuery defines a $ object that is a short-form of jQuery() itself. Some other toolkits also define a $ object. To insure that the Reoderer's use of jQuery does not conflict with other toolkits' definition of $, for example in a portal, one must initialize the Reorderer with a call to jQuery.noConflict().

Note, that it is unclear where this call must happen.

Also, it is good idea to simply use jQuery() instead of $() in the Reorderer code.