Hrrm. Since this only works when javascript is on, I'd like to have it inserted using javascript as well. I know the quick reply doesn't do this -- but it doesnt have to since the entire thing is inserted by javascript.

So. Suggestion: add a <span id="moreoptions-container">. And then in your jquery.commentpreview.js, do something like this:

    $("<input type...>")
        .appendTo("moreoptions-container")
        .click(...)