Looking for an AJAX control that allows me to select a row in a GridView control and move it up or down

I presently have a web page with a GridView control.  It lists reports which I populate from a SQL table.   What I would like, is to add an up arrow and down arrow button that would allow a user to select a row and then click one of the arrows and it would"move" that row in the direction of the arrow clicked.  I hope this makes sense.  Or maybe there is a JQuery function that does this?  Or maybe someone has a JavaScript function that does this and they are willing to share the code?  Any help would be appreciated.