rem: new Effect.MoveBy(element, -top_offset, -left_offset, {duration:0.4}); 
add: var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02; new Effect.MoveBy(element, -top_offset, -left_offset, {duration:dur}); 
context:       reverteffect: function(element, top_offset, left_offset) {        new Effect.MoveBy(element, -top_offset, -left_offset, {duration:0.4});      },
meta: 1000	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1000/3f913f897829fb026ef98df2d57f8da94ee5339d/dragdrop.js/buggy/public/javascripts/dragdrop.js