1var startTime, endTime;
2
3function start() {
4  startTime = new Date();
5};
6
7function end() {
8  endTime = new Date();
9  var timeDiff = endTime - startTime; //in ms
10  // strip the ms
11  timeDiff /= 1000;
12
13  // get seconds 
14  var seconds = Math.round(timeDiff);
15  console.log(seconds + " seconds");
16}