Will you help me with this hands on project? There is something wrong with my code, but I don't know what it is.

JavaScript Web Warrior Series (6th Edition) Hands on Project 7-5

"use strict";

var delivInfo = {};

var delivSummary = document.getElementById("deliverTo");

function processDeliveryInfo() {

var prop;

delivInfo.name = document.getElementById("nameinput").value;

delivInfo.addr = document.getElementById("addrinput").value;

delivInfo.city = document.getElementById("cityinput").value;

delivInfo.email = document.getElementById("emailinput").value;

delivInfo.phone = document.getElementById("phoneinput").value;

for (prop in delivInfo) {

delivSummary.innerHTML += "

" + delivInfo[prop] + "

";

}

};

function previewOrder() {

processDeliveryInfo();

processFood();

document.getElementById("deliverTo").style.display = "block";

document.getElementsByTagName("section")[0].style.display = "block";

};

function createEventListener() {

var previewButton = document.getElementById("previewBtn");

if (previewButton.addEventListener) {

previewButton.addEventListener("click", previewOrder, false);

} else if (previewButton.attachEvent) {

previewButton.attachEvent("onclick", previewOrder);

}

};

if (window.addEventListener) {

window.addEventListener("load", createEventListener, false);

} else if (window.attachEvent) {

window.attachEvent("onload", createEventListener)

}

// Hands-On Project 7-5: order and food processing

var foodInfo = {};

var foodSummary = document.getElementById("order");

function processFood() {

var prop;

var crustOpt = document.getElementsByName("crust");

var toppings = 0;

var toppingBoxes = document.getElementsByName("toppings");

var instr = document.getElementById("instructions");

if (crustOpt[0].checked) {

foodInfo.crust = crustOpt[0].value;

} else {

foodInfo.crust = crustOpt[1].value;

}

foodInfo.size = document.getElementById("size").value;

for (var j = 0; j < toppingBoxes.length; j++) {

if (toppingBoxes[j].checked) {

toppings += 1;

foodInfo["topping" + toppings] = toppingBoxes[j];

}

}

if (instr !== "") {

foodInfo.instructions = instr.value;

}

foodSummary.innerHTML += "

Crust: " + foodInfo.crust + "

";

foodSummary.innerHTML += "

Size: " + foodInfo.size + "

";

foodSummary.innerHTML += "

Topping(s): " + "

"

foodSummary.innerHTML += "

";

for (var i = 1; i < 6; i++) {

if (foodInfo["topping" + i]) {

foodSummary.innerHTML += "

• " + foodInfo["topping" + i] + "
";

}

}

foodSummary.innerHTML += "

";

foodSummary.innerHTML += "

Instructions: " + foodInfo.instructions;

document.getElementById("order").style.display = "block";

};