代码参考：http://jsfiddle.net/amcharts/ATQUm/
JavaScript代码：
var chart;
var chartData = [];
var chartCursor;
var day = 0;
var firstDate = new Date();
firstDate.setDate(firstDate.getDate() - 500);
// generate some random data, quite different range
function generateChartData() {
for (day = 0; day < 50 ...