Ok, I think I figured it out - if you have a DIV on the page with an id of sliderbox, say, you can call parent('#sliderbox')
rSlider = createSlider(0, 255, 100).parent("#sliderbox");
heh, posted it just as you were writing
It seem a little odd to have an element attached to the body and then rip it out and assign its parent, but I can work with it.