code: function(e){
  		this._origMouseDOMPos = Crafty.DOM.translate(e.clientX, e.clientY);
  		this._oldX = this._x;
  		this._oldY = this._y;
  		this._dragging = true;
  
  		Crafty.addEvent(this, Crafty.stage.elem, "mousemove", this._ondrag);
  		Crafty.addEvent(this, Crafty.stage.elem, "mouseup", this._onup);
  		this.trigger("StartDrag", e);
  	}
docs: @
  #._startDrag
  @comp Draggable
  Internal method for starting a drag of an entity either programatically or via Mouse click
  
  @param e - a mouse event