12 days of Christmas Javascript program

12 days of Christmas

window.onload = onPageLoad();

// begins the program
function onPageLoad(){
    print12Days();
}

// function prints the song and calls other functions to return the verse in the song and the written day it is on
function print12Days(){
    var dayOfChristmas = 1; // counter for the day the song is on
    
	// loops through the days creating a string of the song and displaying as each verse increments
    for(dayOfChristmas;dayOfChristmas <= 12;dayOfChristmas++){
        var displayString = "<br /> On the " + getDay(dayOfChristmas) + " day of Christmas, my true love gave to me:<br />"; // initializes the song with the first line that begins every verse also retrieves day in written form
        
		var counter = dayOfChristmas;
		
		while(counter >= 1){
			if(counter == 1) {
                displayString += firstDayOfChristmas() + "<br />";
            } else if(counter == 2) {
                displayString += secondDayOfChristmas() + ", " + "<br />" + "and ";
            } else if(counter == 4) {
				displayString += thirdDayOfChristmas() + ", " + "<br />";
			}else if(counter == 5) {
				displayString += fourthDayOfChristmas() + ", " + "<br />";
			}else if(counter == 6) {
				displayString += fifthDayOfChristmas() + ", " + "<br />";
			}else if(counter == 7) {
				displayString += sixthDayOfChristmas() + ", " + "<br />";
			}else if(counter == 8) {
				displayString += seventhDayOfChristmas() + ", " + "<br />";
			}else if(counter == 9) {
				displayString += eighthDayOfChristmas() + ", " + "<br />";
			}else if(counter == 10) {
				displayString += ninthDayOfChristmas() + ", " + "<br />";
			}else if(counter == 11) {
				displayString += tenthDayOfChristmas() + ", " + "<br />";
			}else if(counter == 12) {
				displayString += eleventhDayOfChristmas() + ", " + "<br />";
			}
			counter--;
		}

		document.write('<p>');
		document.writeln(displayString);
		document.write('</p>');
    
	}
}

function firstDayOfChristmas(){
	var firstDay = "a Partridge in a Pear Tree";
	
	return firstDay;
}

function secondDayOfChristmas(){
	var secondDay = "2 Turtle Doves";
	
	return secondDay;
}

function thirdDayOfChristmas(){
	var thirdDay = "3 French Hens";
	
	return thirdDay;
}

function fourthDayOfChristmas(){
	var fourthDay = "4 Calling Birds";
	
	return fourthDay;
}

function fifthDayOfChristmas(){
	var fifthDay = "5 Golden Rings";
	
	return fifthDay;
}

function sixthDayOfChristmas(){
	var sixth = "6 Geese a Laying";
	
	return sixth;
}

function seventhDayOfChristmas(){
	var seventhDay = "7 Swans a Swimming";
	
	return seventhDay;
}

function eighthDayOfChristmas(){
	var eighthDay = "8 Maids a Milking";
	
	return eighthDay;
}

function ninthDayOfChristmas(){
	var ninthDay = "9 Ladies Dancing";
	
	return ninthDay;
}

function tenthDayOfChristmas(){
	var tenthDay = "10 Lords a Leaping";
	
	return tenthDay;
}

function eleventhDayOfChristmas(){
	var eleventhDay = "11 Pipers Piping";
	
	return eleventhDay;
}

function twelvfthDayOfChristmas(){
	var twelvfthDay = "12 Drummers Drumming";
	
	return twelvfthDay;
}

// this function is cool because it uses JavaScript rules to change an int variable to a string
function getDay(number){
    switch(number){
        case 1:
            return "first";
        case 2:
            return "second";
        case 3:
            return "third";
        case 4:
            return "fourth";
        case 5:
            return "fifth";
        case 6:
            return "sixth";
        case 7:
            return "seventh";
        case 8:
            return "eighth";
        case 9:
            return "ninth";
        case 10:
            return "tenth";
        case 11:
            return "eleventh";
        case 12:
            return "twelfth";
    }
}