Time is on my side

gistfile1.js

var times = $$('li').map(function(e){
    time = e.innerHTML.split(" ")[1].split(":");
    return [time[0], time[1], time[2], 0];
})
horas = (times[1][0] - times[0][0]) + (times[3][0] - times[2][0])
minutos = (times[1][1] - times[0][1]) + (times[3][1] - times[2][1])
htom = horas * 60
sum = minutos + htom;
console.log(parseInt(sum / 60), sum % 60)