For simulating drag drop events (not in IE).

droop.js

var Droop = function(){
    
}
Droop.simulateDragStart = function(target){
  var e = new Event('mousedown');
  target.dispatchEvent(e);
}
Droop.simulateDrag = function(position){
  var e = new Event('mousemove');
  e.pageY = position.y;
  e.pageX = position.x;
  document.dispatchEvent(e);  
}
Droop.simulateDrop = function(target){
  var e = new Event('mouseup');
  e.target = target;
  document.dispatchEvent(e);
}