Here we have a spline Line chart with multiple datasets. The spline option simply makes the lines curvy instead of angular. There's also a shadow enabled and the vertical grid lines are disabled.
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: