How to add mouse event in text area of CKEditor3.X

I would like to detect mouse up and mouse down event in text area of CKEditor3.X The following codes below can listen event by changing event parameter name but I don't known mouse up and mouse down event parameter name.

CKEDITOR.instances.content.on("key",  function(event) {
   ...
});
CKEDITOR.instances.content.on("blur",  function(event) {
   ...
});