/// Finds an element by id.
   /// The id of the element to find.
   /// 
   /// The element, or null if it was not found.
   var e = Function._validateParams(arguments, [
        ,
        
   ]);
   if (e) throw e;
   return Sys.get("#" + id, element || null);

When viewing my website on a Windows XP hosted machine everything works in Firefox. However when I deploy to windows server 2003 and view in Firefox the client-side validations are not displayed. (in Internet explorer they are). Error from Firefox error console upon my validation controls invalidation: Error: Sys.ArgumentUndefinedException: Value cannot be undefined. Parameter name: id Source File: http://d3scqgwebtest/WebHonestyWebsite/ScriptResource.axd?d=CzkpEWKMia8eYS8rr3UG47x6u33AlQwZjFmm9HO3jUAV_u21dxRBn4ilKSMrEj1F0&t=ffffffffd40de07f Line: 5137 and double clicking this error navigates to the page source code: $get = $type.getElementById = function DomElement$getElementById(id, element) { /// Finds an element by id. /// The id of the element to find. /// /// The element, or null if it was not found. var e = Function._validateParams(arguments, [ , ]); if (e) throw e; return Sys.get("#" + id, element || null); It would seem that somehow my validation controls are not being rendered? Strange that the validation controls function as expected when viewing the site hosted on the windows XP machine. == URL of affected sites == http://