Nonfarm employment change

<!DOCTYPE html>
<meta charset="utf-8">

svg{
  	border: 1px solid #f0f;
  }

.axis text {
    font-size: 12px;
    fill: #777;
  }

.axis path {
    display: none;
  }

.axis line {
    stroke-width:1px;
    stroke: #ccc;
    opacity: 0.7;
/*    stroke-dasharray: 2px 2px;*/
  }

.info{
    position: absolute;
    top:100px;
    left:1000px;
    font-size: 20px;
    color:#4682B4;
    font-weight: bold;
    opacity: 0;
  }

.g-minor text{
    display: none;
  }

.g-major line{
    stroke-width:2px;
    stroke: black;
    opacity: 0.7;
  }

</style>

<body>
	
	<h1 class="header">Change in Nonfarm Payroll - Thousands of Jobs</h1>
  <div class="info">
    blah
  </div>
</body>

var margin = {top: 20, right: 30, bottom: 50, left: 20};

var width = 1400 - margin.left - margin.right,
    height = 700 - margin.top - margin.bottom;

var svg = d3.select("body").append("svg")
              .attr("width", width + margin.left + margin.right)
              .attr("height", height + margin.top + margin.bottom)
              .append("g")
              .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var y = d3.scale.linear()
    .range([height, 0]);

var x = d3.scale.ordinal()
            .rangeRoundBands([0,width],0.1);

var yAxis = d3.svg.axis()
                .scale(y)
                .tickSize(-width)
                .tickPadding(8)
                .ticks(10,"+")
                .orient("right");

var xAxis = d3.svg.axis()
                .scale(x)
                .tickSize(-height)
                .tickPadding(8)
                .ticks(4)
                .tickFormat(function(d){return d.split("-")[0];})
                //.tickValues([2009,2010,2011,2012])
                .orient("bottom");

var barWidth = 5;

function mouseover(){
    var element = d3.select(this).style("fill","#4682B4");
    var data = element[0][0].__data__;
    var info = d3.select(".info")
                .style("opacity",1)
                .text(monthNames[+data.month_year.split("-")[1]-1]+
                  " "+ data.month_year.split("-")[0] +
                  " Jobs Change = "+data.jobs_change+",000");

}

function mouseleave(){
    var element = d3.select(this).style("fill","#D3D3D3");
    var info = d3.select(".info").style("opacity",0);
  }

d3.tsv("./jobs.tsv",function(error,data){
    if(error){ alert("error!"); return;}
    console.log("all data",data);

//type casting
    data.forEach(function(d){
      //hack to parse the int, pretty slick
      d.jobs_change = +d.jobs_change;
    // d.month_year = new Date(d.month_year.split("-")[0], d.month_year.split("-")[1]-1);
    });

var jobsChange = data.map(function(d){return d.jobs_change;});
    var months = data.map(function(d){return d.month_year;});

var jobsMin = d3.min(jobsChange);
    var jobsMax = d3.max(jobsChange);

//could use d3.extent() here

y.domain([jobsMin,jobsMax]);
    x.domain(months);

svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + (height) + ")")
      .call(xAxis)
      .selectAll("g")
      .attr("class",function(d){return (d.split("-")[1]==="01")? "g-major": "g-minor";});

//d3.selectAll(".g-major text").text(function(d){return d.split("-")[0];});

svg.append("g")
      .attr("class", "y axis")
      .attr("transform", "translate("+(width-10)+",0)")
      .call(yAxis);

</script>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js