次のコードを確認してください。
<html>
<head>
<script type='text/javascript' src='https://www.google.com/jsapi'></script>
<script type='text/javascript'>
google.load("visualization", "1.0", {packages:["imagechart"]});
</script>
<script type='text/javascript'>
google.setOnLoadCallback(drawChart);
function drawChart() {
var dataTable = new google.visualization.DataTable();
dataTable.addColumn('number');
dataTable.addColumn('number');
dataTable.addRows([
[100,10],
[80,20],
[60,30],
[30,40],
[25,50],
[20,60],
[10,70],
]);
var chart = new google.visualization.ImageChart(document.getElementById('radar_div'));
var options = {cht: 'rs', chco: '00FF00,FF00FF', chg: '25.0,25.0,4.0,4.0', chm: 'B,FF000080,0,1.0,5.0|B,FF990080,1,1.0,5.0',};
chart.draw(dataTable, options);
}
</script>
</head>
<body>
<div id='radar_div'></div>
</body>
</html>
詳細については参照してください