code:

<p id="farwestislateby"></p>

<script>
function humanise (diff) {
    var str = '';
    var values = {
    ' year': 365, 
    ' month': 30, 
    ' day': 1
    };

    for (var x in values) {
        var amount = Math.floor(diff / values[x]);

        if (amount >= 1) {
            if (x != " day"){
                str += amount + x + (amount > 1 ? 's,' : '') + ' ';
            }else{
                str += "and " + amount + x + (amount > 1 ? 's' : '') + '.';
            }
            diff -= amount * values[x];
        }
    }
    return str;
}

var todaysDate = Date.now();
var originalDate = new Date(2011, 11, 31);

// Date subtraction is in milliseconds, convert that to days
daysLate = Math.floor((todaysDate - originalDate) / 86400000);
document.getElementById("farwestislateby").innerHTML = "Far West is " + daysLate + " days past the Kickstarter deadline; that's " + humanise(daysLate)
</script>