docs: function(low, high, event){
  	//the event container
  	this.event = event;
  	//the low value
  	this.low = low;
  	//the high value
  	this.high = high;
  	//the high value for this and all child nodes
  	this.max = this.high;
  	//the nodes to the left
  	this._left = null;
  	//the nodes to the right
  	this._right = null;
  	//the parent node
  	this.parent = null;
  	//the number of child nodes
  	this.height = 0;
  }