This plugin leverages the special event api, to add bind-able drop behavior events. This plugin is designed to work exclusively with $.event.special.drag, actually, it doesn't work without it. Download - jQuery 1.2.6+ required, jquery.event.drag 1.0+ required. jquery.event.drop-1.1.js Complex demo... This plugin compares "dragProxy" position and registered drop target positions asynchronously, bas