How to reset the position of draggable list items?

How to reset the position of draggable list items?


I tried to make a "reset" button in the above example but it doesn't work. List items aren't resetting correctly and they lose the "draggable" property too   

when you try to reset draggable Div elements to their original position you can use something like:

$("#id").css({"left":"0px","top":"0px"});

but this trick doesn't seem to work with list items. Anyone has an idea how to fix this?