drag handler should only modify onselectstart while dragging

[tschaub]

Instead of permanently altering onselectstart (the function that turns thing blue in IE6), the drag handler should only modify this behavior while dragging.

The following patch allows you to select things in your document while the drag handler is active (on a page with the navigation control for example). Without the patch, in IE, you can't select anything on the page, ever.

Other modifications include: - browser event handlers always return a value - activate/deactivate pay attention to the return of their parent - some jsdoc text

[tschaub]

only disable IE selecting while dragging

[tschaub]

have review, will commit

[sderle]

this patch looks good. the only thing I would change would be to add a "oldSelectStart: null" declaration in the Drag class preamble. I say do that and then check it in. I wouldn't bother submitting a new patch if that's all you change.

[tschaub]

applied in r2908