Programmatically discovering version and if the browser's co

Sorry if this has been asked before, but I read the posts for the last three months and I don't see it.

Question one: how do I display to the visitor the version of CKEditor in use? With JQuery, for example, in HTML I simply

document.write $().jquery

In XHTML I can use

$('span#jquery').html($().jquery)

and then put

<p>Using JQuery version <span id='jquery'></span></p>

in my webpage.

Question two: how do I discover if the browser currently in use is compatible with CKEditor? Server-side, in FCKEditor 2, I used to call

$oFCKeditor = new FCKeditor(); $itWorks = $oFCKeditor->IsCompatible()

How is this done in version 3?