Fixed "show/hide all" option.

There was a conflict with the variable "items" in jquery. This is not a recommended name anyway.

Details:
With Javascript debug was detected that:
1 - In the "Faq" template the "items" variable is set:
</dl><scripttype="text/javascript">items=11;...
 
2 - In the jquery code the variable get lost:
return typeof v=="undefined"||!!e&&v.event.triggered===e.type?t:v.event.dispatch.apply(u.elem,arguments)}...