JAVASCRIPT : Add st, nd, rd and th (ordinal) suffix to a number

I would like to dynamically generate a string of text based on a current day. 
So, for example, if it is day 1 then I would like my code to generate  =  "1st".

2 = "2nd"
3 = "3rd"

I Searched And Found Good function to get ordinal suffix for number

function ordinal_suffix_of(i) {

    var j = i % 10,

        k = i % 100;

    if (j == 1 && k != 11) {

        return i + "st";

    }

    if (j == 2 && k != 12) {

        return i + "nd";

    }

    if (j == 3 && k != 13) {

        return i + "rd";

    }

    return i + "th";

}