fix events

fixEvent.js

function fixEvent(e, _this) {
  e = e || window.event;

  if (!e.currentTarget) e.currentTarget = _this;
  if (!e.target) e.target = e.srcElement;

  if (!e.relatedTarget) {
    if (e.type == 'mouseover') e.relatedTarget = e.fromElement;
    if (e.type == 'mouseout') e.relatedTarget = e.toElement;
  }
  
  if (e.pageX == null && e.clientX != null ) {
    var html = document.documentElement;
    var body = document.body;

    e.pageX = e.clientX + (html.scrollLeft || body && body.scrollLeft || 0);
    e.pageX -= html.clientLeft || 0;

    e.pageY = e.clientY + (html.scrollTop || body && body.scrollTop || 0);
    e.pageY -= html.clientTop || 0;
  }

  if (!e.which && e.button) {
    e.which = e.button & 1 ? 1 : ( e.button & 2 ? 3 : (e.button & 4 ? 2 : 0) );
  }

  return e;
}