How long is a course on zenler?

gistfile1.txt

var times = document.getElementsByClassName("curr-time");
var totaltime= 0;
for (var i = 0, len = times.length; i < len; i++) {
    time = document.getElementsByClassName("curr-time")[i].innerText.trim();
    if(time.length>0){
        var b = time.split(':');
        console.log(b);
        seconds = (Number(b[0])*60) + (Number(b[1]));
        totaltime+=seconds;
    }
}
console.log(" - " + totaltime + " seconds : " + totaltime / (60*60) + " hours" )

Based on code found here https://stackoverflow.com/questions/25764553/add-2-times-together-javascript