I agree with your comment regarding dclick for check/radio/text boxes, but disagree in regards to edit boxes etc.
An SCLICK event in an editbox would be handy if you wanted to clear text in it when it was clicked on, or some other thing.
A good example of this is having text cleared from a form editbox in a website. It is something that some people want to do (there was a thread in scripts and popups recently asking this same question).
