text: function Containment(element) {
  	this.element = element;
  	this._init();
  }
  
  Containment.prototype.getWidth = function () {
  	return this._width;
  };
  
  Containment.prototype.getHeight = function () {
  	return this._height;
  };
  
  Containment.prototype._init = function () {
  	this._width = this.element.offsetWidth;
  	this._height = this.element.offsetHeight;
  };