Relative Time (for Twitter)

gistfile1

// $.relativeTime - returns a string that tells how long ago the passed in string happened. For Twitter.
$.relativeTime = function(dateString) {
        var rightNow = new Date();
        var then = new Date(dateString);
         
        if ($.browser.msie) {
            // IE can't parse these crazy Ruby dates
            then = Date.parse(dateString.replace(/( \+)/, ' UTC$1'));
        }
 
        var diff = rightNow - then;
 
        var second = 1000,
        minute = second * 60,
        hour = minute * 60,
        day = hour * 24,
        week = day * 7;
 
        if (isNaN(diff) || diff < 0) {
            return ""; // return blank string if unknown
        }
 
        if (diff < second * 2) {
            // within 2 seconds
            return "right now";
        }
 
        if (diff < minute) {
            return Math.floor(diff / second) + " seconds ago";
        }
 
        if (diff < minute * 2) {
            return "about 1 minute ago";
        }
 
        if (diff < hour) {
            return Math.floor(diff / minute) + " minutes ago";
        }
 
        if (diff < hour * 2) {
            return "about 1 hour ago";
        }
 
        if (diff < day) {
            return  Math.floor(diff / hour) + " hours ago";
        }
 
        if (diff > day && diff < day * 2) {
            return "yesterday";
        }
 
        if (diff < day * 365) {
            return Math.floor(diff / day) + " days ago";
        }
 
        else {
            return "over a year ago";
        }
    }