[MagnetiCat]

You can also use the excellent Drag and Drop utility included in the YUI library to achieve the same thing. The good side of doing so is that YUI's core files are already used in vBulletin, so you do not need to add a lot of additional javascript libraries.

But as others said, this is something which requires a javascript/vb expert - maybe you could try asking in some of the mod threads offering similar functionality you have been already suggested in here.