History of WindowTimers.clearTimeout()

Update tags and spec link

Edit to example description to what i think it was intended for (event debouncing)

Alert doesn't show up if you click an even number of times within one second in the example

Set timeoutid to undefined instead of using delete on an object; minor fix to spacing

The sample code wasn't working as described because the timeout was being reset with every click.

Editorial review completed.

Errant list item in See also.