var barChartData = {
labels : ["", "总时长", "有效时长", "60-90", "90-120", "150-180", "150-180",
"150-180" , "150-180", "180-210", "210-240", "240-270"],
datasets : [ {
fillColor : "rgba(255,105,0,1)",
data : ["", 60, 59, 100, 40, 56, 55, 40, 30, 40, 50, 60 ]
}, ]
};
var ctx = document.getElementById("bar").getContext("2d");
var myNewChart = new Chart(ctx).Bar(barChartData);
//new Chart(document.getElementById("bar").getContext("2d")).Bar(barChartData);

有人会吗？