Slopegraph lines in SVG and Canvas

Copy-paste of a code found here: https://github.com/solenoid/slopegraph/blob/master/slopegraph.html

<!DOCTYPE html>
<html>
    <head>
        <title>Slopegraph.js</title>
        <style type="text/css">
        </style>
        <script src="https://github.com/mbostock/d3/raw/master/d3.min.js"></script>
        <script type="text/javascript">
        var dataset=[[10, 100], [430, 441], [103, 89], [228, 62], [393, 258], [250, 167], [290, 322], [480, 17], [94, 27], [116, 163]]
        var widthOfCanvas = '500';
        var heightOfCanvas = dataset.join().split(',').sort(function(a,b){return b - a})[0];
        window.onload = function() {
            var drawingCanvas = document.getElementById('slopegraph');
            drawingCanvas.setAttribute('width', widthOfCanvas);
            drawingCanvas.setAttribute('height', heightOfCanvas);
            if(drawingCanvas && drawingCanvas.getContext) {
            var context = drawingCanvas.getContext('2d');
            context.strokeStyle = "#ccc";
            function chart(leftValue, rightValue){
            context.moveTo(0,leftValue);
            context.lineTo(widthOfCanvas, rightValue);
            context.stroke();
            };
        for (var key in dataset) {
            chart(dataset[key][0], dataset[key][1]);
            };
        }
        var vis = d3.select("#svgslopegraph").append("svg:svg")
        .attr("width", widthOfCanvas)
        .attr("height", heightOfCanvas);
        vis.selectAll("line")
        .data(dataset)
        .enter()
        .append("svg:line")
        .style("stroke-width", 1)
        .style("stroke", "#ccc")
        .attr("y1", function (d) { return d[0]; })
        .attr("y2", function (d) { return d[1]; })
        .attr("x1", function (d) { return 0; })
        .attr("x2", function (d) { return widthOfCanvas; });
        }
        </script>
    </head>
    <body>
        <canvas id="slopegraph">
            <p>Your browser doesn't support canvas. Firefox and Chrome do, though.</p>
        </canvas>
        <div id="svgslopegraph" style="position:absolute; top: 10px;left: 600px;"></div>
    </body>
</html>

Modified http://github.com/mbostock/d3/raw/master/d3.min.js to a secure url

https://github.com/mbostock/d3/raw/master/d3.min.js