(d){
									var x=xscale(options.title_column),
										y=yscales[options.title_column](d.values[options.title_column]);

									return "translate("+x+","+y+")";

								});
			lang_label.append("rect")
							.attr("class","hover")
							.attr("x",-(padding.left))
							.attr("width",padding.left)
							.attr("y",-13+3)
							.attr("height",18)

			var rect=lang_label.append("rect")
							.attr("x",-(padding.left))
							.attr("width",padding.left)
							.attr("y",-13+3)
							.attr("height"