Div transform into editor instance

I want jaqury or ajax method for Div transform into editor instance. When i will click 开发者_JAVA百科into div then it will change in to editor where i can change the div context and use all functions of editor. I am not getting any soution for this using jquery or ajax.

Here you can find a nice list of Editors for what you want. (i can recommend MarkItUp!, i'ts a very nice editor)