functionn createTrackMouseMovement (target, moving) {
  return {

    function trackMouseMovement (evt) {
        var dropInfo = layoutHandler.isDropBefore (evt, target, moving);
        if (dropInfo === fluid.position.NO_TARGET) {
        	dropMarker.style.visibility = "hidden";
        }
        else if (dropInfo === fluid.position.BEFORE) {
            jQuery (target).before (dropMarker);
            dropMarker.style.visibility = "visible";
        }
        else {  // must be AFTER
        	jQuery (evt.data.target).after (dropMarker);
            dropMarker.style.visibility = "visible";
        }
     };

}