Position

Position

Hello
I am not a pro web designer by any stretch of the imagination but I have just discovered jquery which is very cool and very wonderful! I am confused about how to use the Position utility. I'm not even sure I understand exactly what it does so if my take on it below is wrong, please educate me!
I can see on the demo page that you can drag and drop divs to different places on a webpage. Does this tool allow me to visually position divs on my webpage pre-publishing so that I don't have to do it by hand coding in my web editor (Dreamweaver)? If yes, then how do I actually use the utility? I can't figure out how to open the utility, load my HTML page code into it and then start dragging/positioning divs and then how to save the resulting positioning code and how to integrate it into the  HTML code of my page. Sorry if I'm being thick.
Thanks
upalm