Transfer effect misses target

The jQuery ui transfer effect misses it's target element if a margin ( auto ) has been

applied to the body element. When you resize the browser, it only get worse.

Reproducible bug case:

http://dl.dropbox.com/u/1381492/bugs/jqueryui/transfer.html

You can "patch" this case by changing the appendTo(document.body) => appendTo(document.documentElement)

but if a user applies margins to the HTML element this will reproduce the same issue. So the best thing would probably to detect if the element that we are appending to has a margin or padding applied.

The offeset() method however reports top and left of 0 for the body and documentElement we should be using jQuery.css(document.documentElement, "marginLeft") to get the correct position of the root elements.