Jquery drag-and-drop and simple save implementation code _ jquery

Now, I am bored. By the way, I took a look at the drag plug-in of jqueryui. The drag-and-drop method is very simple. After seeing the effect, I'm excited... but how can we save the order? I think of cookies. But how can I use cookies to save the order? I can directly Save the html code to read and overwrite it next time. But I always feel that there are more things to save if there is too much content, then, you can use the ui plug-in to obtain the id and save the id in the read order .. directly look at the code...

The Code is as follows: