D3 OnClick

chart.selectAll("rect")
		    .data(counts)
		    .enter().append("rect")
		    .attr("id", function (d, i) {return keys[i];})
		    .attr("x", legendWidth)
		    .attr("y", function (d, i) {return i * bar_height;})
		    .attr("width", x)
		    .attr("height", bar_height - gap)
		    .attr("fill", "url(#gradient)")
		    .on("click", fmpurl);
		    
function fmpurl() {
		var url = 'fmp://$/«DATABASE»?script=Load&param=' + this.id;
		window.location = url;
}