[Javascript] code deciphering help

[Ben Curtis]

> y=(nav)?e.pageY:event.y+document.body.scrollTop;
> skn.top=y+yyy;
> 
> ... What primarily confuses
> me is the question mark(?) and the colon(:).

This:

y=(nav)?e.pageY:event.y+document.body.scrollTop;

...can be rewritten as this:

if (nav) {
   y = e.pageY;
} else {
   y = event.y + document.body.scrollTop;
}


This is some code that creates a value y in one way for Netscape4 and
another way for IE. It then places the skn layer vertically at the position
y, plus some modifier yyy.

+Ben Curtis
...just this guy, you know?