var values  = $(".updatetime").html().split(":");
// var values = container.nodeValue.split(":");

// Because there is only a datetime specified, I assume is the current date
var now = new Date();
var time = new Date(now.getFullYear(), now.getMonth(), now.getDate(),
                    values[0], values[1], values[2]).getTime();

setInterval(function() {
    time += 1000;
    var date = new Date(time);
    var values = [date.getHours(), date.getMinutes(), date.getSeconds()];

    for (var i = 0; i < 3; i++)
        if (values[i] < 10)
            values[i] = "0" + values[i];

    //container.nodeValue = values.join(":");
   $(".updatetime").html(values.join(":"));
}, 1000);