Check for same origin before using window.top

[sdir456]

With #207 top.document should be used to attach the event handlers. When the top window is from a different origin (e.g. the site is embedded in an iframe from a different origin) then access to window.top (and therefore top.document) is prohibited by the browser. This leads to the following exception:

Therefore access to window.top should be avoided or at least there should be a check if its safe to acces it (try catch?).

edit:
I don't know why, but there is a commit that reverts the changes from #207
see 106c198
But its not already releaset so that the current released version still contains the access of window.top

[sneetsher]

Or jQuery .focusout() could be used on the control component itself instead of click on top/parent element.