jQuery FAQ: How do you create a textarea using jQuery? Also, how do I insert content (text or HTML) into a textarea with jQuery?
I don't know if this will make any sense without showing my HTML, but I just used the following jQuery code to (a) get contents from a specific div tag, (b) add a textarea just before that div, (c) put the HTML contents into the new textarea, then (d) remove the original div. So, in essence, I created a new textarea with jQuery and inserted HTML into that textarea, but I got the HTML from my original div.