Pictures not showing

I updated my code and I cant seem to figure out why my pictures are not showing when I open the webpage

“use strict”; // interpret document contents in JavaScript strict mode

/* global variables */
var photoOrder = [1,2,3,4,5];

/* shift all images one figure to the left, and change values in photoOrder array to match */
function rightArrow() {
for (var i = 0; i < 5; i++) {
if ((photoOrder[i] + 1) === 6) {
photoOrder[i] = 1;
} else {
photoOrder[i] += 1;
}
populateFigures();
}
}

/* shift all images one figure to the right, and change values in photoOrder array to match */
function leftArrow() {
for (var i = 0; i < 5; i++) {
if ((photoOrder[i] – 1) === 0) {
photoOrder[i] = 5;
} else {
photoOrder[i] -= 1;
}
populateFigures();
}
}
/* create event listeners for left arrow, right arrow, and center figure element */
function createEventListeners() {
var leftArrow = document.getElementById(“leftArrow”);
if (leftArrow.addEventListener){
leftArrow.addEventListener(“click”, leftArrow, false);
} else if (leftArrow.attachEvent) {
leftArrow.attachEvent(“onclick”, leftArrow);
}
var rightArrow = document.getElementById(“rightArrow”);
if (rightArrow.addEventListener){
rightArrow.addEventListener(“click”, rightArrow, false);
} else if (rightArrow.attachEvent) {
rightArrow.attachEvent(“onclick”, rightArrow);
}
var mainFig = document.getElementsByTagName(“img”)[1];
if (mainFig.addEventListener) {
mainFig.addEventListener(“click”, zoomFig, false);
} else if (mainFig.attachEvent) {
mainFig.attachEvent(“onclick”, zoomFig);
}
}
/* add src values to img elements based on order specfied in photoOrder array */
function populateFigures () {
var filename;
var currentFig;
for (var i = 1; i < 4; i++) {
filename = “images/IMG_0” + photoOrder[i] + “sm.jpg”;
currentFig = document.getElementsByTagName(“img”)[i – 1];
currentFig.src = filename;
}
}
/* open center figure in separate window */
function zoomFig() {

}

/* create event listeners and populate image elements */
function setUpPage() {
createEventListeners();
populateFigures();
}

/* run setUpPage() function when page finishes loading */
if (window.addEventListener) {
window.addEventListener(“load”, setUpPage, false);
} else if (window.attachEvent) {
window.attachEvent(“onload”, setUpPage);
}

Also in #JavaScript _↴