Custom Script for a "relative ranking"

Here's a ranking sample I found on SO. You would collect the 4 field values in an array and rank them using function below. You would get a ranked array back.

// https://stackoverflow.com/questions/14834571/ranking-array-elements

var arr = [30, 23, 21, 45];

rankings (arr); // Result: 2,3,4,1

function rankings(arr) {
    var rankingsArr = [];
    for (var i = 0; i < arr.length; i++) {
        var rank = 1;
        for (var j = 0; j < arr.length; j++) {
            if (arr[j] > arr[i]) rank++;
        }
        rankingsArr.push(rank);
    }
    return rankingsArr;
}