code: function DOMRange(document) {
  	// save document parameter
  	this._document = document;
  	
  	// initialize range
  //[TODO] this should be located at document[0], document[0]
  	this.startContainer = this.endContainer = document.body;
  	this.endOffset = DOMUtils.getNodeLength(document.body);
  }
docs: /*
  DOM Range