I try to catch the Blur and Focus Events of a tinyMce Editor.

I found following way for this.

```
            ed.onInit.add(function(ed) {
                tinyMCE.execCommand('mceRepaint');

                var dom = ed.dom;
                var doc = ed.getDoc();

                if (o.onblurtopics) {
                    tinymce.dom.Event.add(doc, 'blur', function(e) {
                        alert("blur");
                    });
                }
                if (o.onfocustopics) {
                    tinymce.dom.Event.add(doc, 'focus', function(e) {
                        alert("focus");
                    });
                }

            });

```

This works fine, but only in Firefox. When I try this in current Chromium or IE8 it has no effect.

Does anyone has a suggestion?