google.visualization.DataTable, date is undefined

google.visualization.DataTable, date is undefined

Consider the following code:
google.load("visualization", "1", {
packages: ["corechart"]
});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.DataTable();
data.addColumn('datetime', 'Time');
data.addColumn('number', 'Leads');
data.addRow([Date.parse("2013-08-17 10:12:18"), 0]);
data.addRow([Date.parse("2013-08-17 09:13:42"), 14]);
data.addRow([Date.parse("2013-08-17 10:00:05"), 15]);
data.addRow([Date.parse("2013-08-17 11:12:18"), 3]);
var options = {
title: 'Company Performance',
fontSize: '12px',
curveType: 'function',
pointSize: 5,
hAxis: {
title: 'Daily Report',
titleTextStyle: {
color: '#FF0000'
}
},
vAxis: {
title: 'Leads',
titleTextStyle: {
color: '#FF0000'
}
}
};
var chart = new
google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
Now, the above code load google chart api, defined a DataTable & should
generate as LineChart graph but it doesn't. Instead, I the following error
when trying to add Columns
TypeError: data is undefined #at this line --> data.addColumn('datetime',
'Time')
Can anyone tell me what am I missing?