I wanted to use a Rich Text Editor for a text area inside an update panel.
I found this post: http://www.queness.com/post/212/10-jquery-and-non-jquery-javascript-ric
You have to trigger the save function when posting back, use Page.RegisterOnSubmitStatement to register the script tinyMCE.triggerSave();
tinyMCE.triggerSave();
I noticed that tinyMCE's init function can only be called selecting all textareas or textareas with a certain class. The exact doesn't work.
init
exact