A Line chart with a gradient

This is a demonstration of a filled blue Line chart that actually uses a gradient for the fill color. There's a title and also no vertical background grid lines.

This goes in the documents header:
<script src="RGraph.svg.common.core.js"></script>
<script src="RGraph.svg.line.js"></script>
Put this where you want the chart to show up:
<div style="width: 750px; height: 300px" id="chart-container"></div>
This is the code that generates the chart:
<script>
    new RGraph.SVG.Line({
        id: 'chart-container',
        data: [
            4,3,5,9,2,10,5,
            8,6,4,3,5,2,4,
            7,6,9,4,5,5,2,
            4,6,9,9,8,6,5
        ],
        options: {
            backgroundGridColor: 'Gradient(#ddd:white)',
            backgroundGridVlines: false,
            backgroundGridBorder: false,
            hmargin: 10,
            title: 'A line chart with a gradient',
            marginLeft: 50,
            marginBottom: 50,
            yaxis: false,
            xaxisColor: 'gray',
            xaxisLabels: ['Q1','Q2','Q3','Q4'],
            xaxisLabelsPosition: 'section',
            spline: true,
            colors: ['black'],
            filled: true,
            filledColors: ['Gradient(blue:#ccf)'],
            linewidth: 3,
            textColor: 'gray'
        }
    }).draw();
</script>