countdown.js

'function counter() {
 var today = new Date(); //variable contains current date and time

 var days = calcDays(today); //calculate the time left until set date below
 document.countDown.daysLeft.value = Math.floor(days); // displays days rounded to the next lowest integer

 var hours = (days - Math.floor(days)) * 24; //calculate the hours left in the current day
 document.countDown.hrLeft.value = Math.floor(hours); // display hours rounded to the next lowest integer

 var minutes = (hours - Math.floor(hours)) * 60; // calculate the minutes left in the current hour
 document.countDown.minLeft.value = Math.floor(minutes); // display minutes rounded to the next lowest integer

 var seconds = (minutes - Math.floor(minutes)) * 60; //calculate the seconds left in the current minute
 document.countDown.secLeft.value = Math.floor(seconds); // display seconds rounded to the next lowest integer
}

function calcDays(currentDate) {
 //create a date object for date of graduation
 //calculate the difference between currentDate and set date
 setDate = new Date("January 13, 2017");
 currentTime = currentDate.getFullYear() + 0;
 setDate.setFullYear(currentTime);

 days = (setDate - currentDate) / (1000 * 60 * 60 * 24);
 return days;
}

setInterval('counter()', 1000)'