How to add a picture in the corner of quick reply?

I was wondering what the code for the picture in the corner of quick reply is?

(sorry if that doesn't make sense)

bump

Code:

form#quick_reply textarea#text_editor_textarea {
background : url(Image URL) ;
   }

Add this to your css.

Thank you it worked!

Since this thread appears to be solved, I will lock this thread and mark it as solved.


Sanket