I'm building a new version of an often used data entry form on our
site Waarneming.nl (int'l version Observado.org).
It struck me that I often have to write something like this:

if (cond) $(this).show() else $(this).hide();

Since jQuery is about reducing and chaining, wouldn't it be nice if I
could write it like this:

$(this).toggle(cond); // shows if cond evaluates to true, else hides

Of course a new function showhide could be made for this, but toggle
seems a likely candidate for overloading.

-Dylan