Relative date function

relative_date.js

// Returns a text description of a past time relative to now, e.g: 1 minute ago, 3 hours ago, 2 years ago.

var intervals = [['year', 31556926], ['month', 2629744], ['week', 604800], ['day', 86400], ['hour', 3600], ['minute', 60], ['second', 1]];

// time is in seconds
function textDate (time) {

	var diff = new Date().valueOf() * 1000 - time, i, v, n;

	for (i = 0; i < intervals.length; i++) {
		v = intervals[i];

		if (diff > v[1]) {
			n = Math.floor(diff / v[1]);
			return n + ' ' + v[0] + ((n === 1) ? '' : 's') + ' ago';
		}
	}

	return 'Just now';
}