2 bugfixes, one for adjusting the "top" position correctly with body margin, the other for fixing a condition where _attach is called with "undefined" instead of "null", causing an exception
fix exception in _attach when no current guider
If resize fires before the current guider is fully shown myGuider is
"undefined" which doesn't match null
fix offset adjustment for top margin
top wasn't adjusted and base was NaN after this, though it wasn't used
@dbellizzi, thanks for the fix. The 'no guider current' was really annoying. Will be waiting for your patch in the new version.