function humanize(number) {  
            if(number % 100 >= 11 && number % 100 <= 13)  
                return number + "th";  
              
            switch(number % 10) {  
                case 1: return number + "st";  
                case 2: return number + "nd";  
                case 3: return number + "rd";  
            }  
              
            return number + "th";  
        }  
    console.log(humanize(1));  
    console.log(humanize(20));  
    console.log(humanize(302));