I know that it is good sometimes to associate a label with a checkbox:

<input id=something type=checkbox value=somevalue />

<label for=something>this is label text</label>

..but do I have to use an id to associate it?

The main reason I even care is because I like being able to click a label to toggle the checkbox value, but don't like the idea of using an id for something so simple.

I guess I could use jQuery toggle the previous element (checkbox) of a clicked label, but maybe there is something simpler I'm missing. https://stackoverflow.com/a/2720771/923817 looked like a solution, but the user said it doesn't work in IE.