jQuery Sparkline - Overriden tooltip
https://groups.google.com/d/topic/jquery-sparkline/s-XjpA9QMWo/discussion
HTML
<script src="http://omnipotent.net/jquery.sparkline/2.1/jquery.sparkline.js"></script>
<span id="sparkline"> </span>
JavaScript
var values = [{value:123}, {value:234}, {value:345}];
// Draw a sparkline for the #sparkline element
$('#sparkline').sparkline(values.map(function(o) { return o.value}), {
});