element._revert = new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur}); 
new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur, queue: {scope:'_draggable', position:'end'} }); 
      reverteffect: function(element, top_offset, left_offset) {        var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02;        element._revert = new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur});      },
6445	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6445/81ea0800bc8ad92d491743716cd489cad7333723/dragdrop.js/buggy/vendor/rails/railties/html/javascripts/dragdrop.js