pageBlockEls selector

Hi,

In my current accessibility project I had a task that not only the input fields should get focused on the overlay, but also the links. Sadly this is hard-coded into blockui plugin, so I made it an option. So now I can edit it e.g. like this: ':input:enabled:visible,a:visible'.

I hope you'll like it, besides this I really like your plug-in, keep up the great work!

Péter