$.each(ddts, function(i, item) {
var tm = item["time"];
var d = new Date(tm[0], tm[1]-1, tm[2]);
var entry = [d, item["value"]];
data_chart.push(entry);
$.each(ddts, function(i, item) {
var tm = item["time"];
var d = new Date(tm[0], tm[1]-1, tm[2]);
var entry = [d, item["value"]];
data_chart.push(entry);