Move To Top Of List With Javascript

I'm trying to create a button that will move the currently selected OPTION in a SELECT MULTIPLE list to the top of that list. I currently have OptionTransfer.js implemented, which

Solution 1:

Use DOM manipulation methods. Given:

varselect = document.getElementById ("...");     // select elementvar option = select.options[select.selectedIndex] // option element

1. Remove selected option from select: select.removeChild (option)
2. Reinsert it as first child: select.insertChild (option, select.firstChild)

Or use select.add() and select.remove()

http://www.w3schools.com/jsref/dom_obj_select.asp