An SVG Line chart with tooltips

A simple Line chart that has the X-axis positioned in the middle and has tooltips enabled. The tickmarks in a dot style - ie a point with a circle around them.

This goes in the documents header:
<script src="RGraph.svg.common.core.js"></script>
<script src="RGraph.svg.common.tooltips.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 - it should be placed AFTER the <div> tag: