Rob Hatch Rnhatch

This examples demonstrates how to use D3's brush component to implement focus + context zooming. Click and drag in the small chart below to pan or zoom.
See Results at http://bl.ocks.org/1671866

	//Simple d3.js barchart example to illustrate d3 selections

	//other good related tutorials
	//http://www.recursion.org/d3-for-mere-mortals/
	//http://mbostock.github.com/d3/tutorial/bar-1.html


	var w = 850
	var h = 400
	var bars = function(data)