[Javascript] Returning a Question

[Triche Osborne]

Scott's problem and its solution reminded me of a question I've been 
wanting to ask re: the following:

<a onclick="return(showPic(this))" href="image.jpg" />

What, exactly, is return doing in this instance? The function has no 
explicit return value, so I'm guessing this returns a Boolean? If so, 
why does this cancel the normal behavior (link that opens with the href 
value)? If not, what is being returned and why does it cancel normal 
behavior?
	None of my JS references explains the use (or not) of return in a 
function call when there is no explicit value to be returned. (They use 
it sometimes, but don't explain *why*.)

Triche