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Function won't return a value [duplicate]

This question already has answers here:
How do I return the response from an asynchronous call?
(41 answers)
Closed 5 years ago.
I'm making a password generator. Trying to implement pass-phrases.
The function loadFile(); won't return a value to my main function, generate();
I think I'm too close to the problem and can't logic it out. I could use some help. Thank you.
Test site: https://jf0.000webhostapp.com/passWordGenerator/
test.js source: https://jf0.000webhostapp.com/passWordGenerator/test.js
The source is getting kind of long, sorry.
//Main generate password function
function generatePassword(){
var x = document.getElementById("passOutput");
var p = document.getElementById("testP");
x.value = generate();
//Make sure they aren't using an insecure number of characters
checkMaxChars();
p.innerText = x.value;
}
//Generate a password. 3 passSets for customization, one for passphrase
function generate(){
var nL = document.getElementById("noLetters");
var nN = document.getElementById("noNumbers");
var nS = document.getElementById("noSymbols");
var pPK = document.getElementById("passWordPhrase");
var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
var numbers = "0123456789";
var symbols = "!##$%^&*()_+~`|}{[]:;?,.-='";
var maxChars = document.getElementById("maxCharControl").value;
var generatedPass = "";
var holdPass = "";
//Main loop
for(var i = 0;i < maxChars;i++){
//Pick random value for each passSet
var passSet1 = chars.charAt(Math.random() * chars.length);
var passSet2 = numbers.charAt(Math.random() * numbers.length);
var passSet3 = symbols.charAt(Math.random() * symbols.length);
//if a checkbox is selected, clear out that value
if(nL.checked == true){passSet1 = "";}
if(nN.checked == true){passSet2 = "";}
if(nS.checked == true){passSet3 = "";}
//Randomly select a set to be added to holdPass, or not if it is empty.
var r = Math.floor((Math.random() * 4) + 1);
if(r == 1){if (passSet1 == ""){i--}else{holdPass += passSet1;}}
if(r == 2){if (passSet2 == ""){i--}else{holdPass += passSet2;}}
if(r == 3){if (passSet3 == ""){i--}else{holdPass += passSet3;}}
if(r == 4){
if(pPK.checked == true){
//get the value from loadFile(); and apply it to passSet4, add that to holdPass.
}}
}
generatedPass = holdPass;
console.log("Max Characters:" + maxChars);
console.log("passSet1:" + passSet1);
console.log("passSet2:" + passSet2);
console.log("passSet3:" + passSet3);
console.log("Iteration:" + i);
console.log("Random Position:" + r);
console.log("Password:" + holdPass + "::::" + holdPass.length);
//return password
return generatedPass;
}
//Make sure they didn't select all the checkboxes
function checkBoxes(){
var nL = document.getElementById("noLetters");
var nN = document.getElementById("noNumbers");
var nS = document.getElementById("noSymbols");
var pP = document.getElementById("passWordPhrase");
var nA = document.getElementById("noticeArea");
var nT = document.getElementById("noticeAreaText");
if(nL.checked == true && nN.checked == true && nS.checked == true){
nL.checked = false;
nN.checked = false;
nS.checked = false;
nA.style.display = "block";
nT.innerHTML = "You cannot select all checkboxes at once.";
window.setTimeout(hideNotice,5000);
}
else{
nA.style.display = "none";
nT.innerHTML = "";
}
}
//make sure the max characters is greater than 8
function checkMaxChars(){
var maxChars = document.getElementById("maxCharControl").value;
var nA = document.getElementById("noticeArea");
var nT = document.getElementById("noticeAreaText");
var x = document.getElementById("passOutput");
console.log(maxChars);
if (maxChars < 8){
x.value = "";
nA.style.display = "block";
nT.innerHTML = "You cannot generate a password less than 8 characters in length for security reasons.";
window.setTimeout(hideNotice,7000);
}
}
//hides the notice area div once the message is completed
function hideNotice(){
var nA = document.getElementById("noticeArea");
var nT = document.getElementById("noticeAreaText");
nA.style.display = "none";
nT.innerHTML = "";
}
//Load file
function loadFile() {
var xhttp = new XMLHttpRequest();
var x;
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
x = this.responseText;
parseResponse(x);
}
}
xhttp.open("GET", "wordList.csv", true);
xhttp.send();
return x;
}
//Format response
function parseResponse(x){
console.log("MADE IT HERE!");
var dS,sV1,rPos;
dS = x.split(",");
for(var i =0;i < dS.length;i++){
sV1 = dS[i];
}
x = sV1;
}

The results of an AJAX request will never be available until after the function that initiated it completes. You are attempting to return x before at the end of the function that initiates the request, which is before the AJAX request has finished.
You need to move that line into your AJAX success handler.
function loadFile() {
var xhttp = new XMLHttpRequest();
var x;
// The onreadystatechange callback function will execute
// at some future point after loadFile has completed, so
// you can only gain access to the AJAX result from within
// that function.
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
x = this.responseText;
parseResponse(x);
return x;
}
}
xhttp.open("GET", "wordList.csv", true);
xhttp.send();
}

Your xhttp request is opened asynchronously with the true in xhttp.open("GET", "wordList.csv", true); so x is returned before a value is assigned to it.
Edit: said synchronously instead of asynchronously because I am dumb

mediawiki api can not display the results from array

Hello you wonderful people, I am trying to build JavaScript file to extract information from Wikipedia based on search value in the input field and then display the results with the title like link so the user can click the link and read about it. So far I am getting the requested information in(JSON)format from Mediawiki(Wikipedia) but I can't get it to display on the page. I think I have an error code after the JavaScript array.
I'm new at JavaScript any help, or hint will be appreciated.
Sorry my script is messy but I am experimenting a lot with it.
Thanks.
var httpRequest = false ;
var wikiReport;
function getRequestObject() {
try {
httpRequest = new XMLHttpRequest();
} catch (requestError) {
return false;
}
return httpRequest;
}
function getWiki(evt) {
if (evt.preventDefault) {
evt.preventDefault();
} else {
evt.returnValue = false;
}
var search = document.getElementsByTagName("input")[0].value;//("search").value;
if (!httpRequest) {
httpRequest = getRequestObject();
}
httpRequest.abort();
httpRequest.open("GET", "https://en.wikipedia.org/w/api.php?action=query&format=json&gsrlimit=3&generator=search&origin=*&gsrsearch=" + search , true);//("get", "StockCheck.php?t=" + entry, true);
//httpRequest.send();
httpRequest.send();
httpRequest.onreadystatechange = displayData;
}
function displayData() {
if(httpRequest.readyState === 4 && httpRequest.status === 200) {
wikiReport = JSON.parse(httpRequest.responseText);//for sunchronus request
//wikiReport = httpRequest.responseText;//for asynchronus request and response
//var wikiReport = httpRequest.responseXML;//processing XML data
var info = wikiReport.query;
var articleWiki = document.getElementsByTagName("article")[0];//creating the div array for displaying the results
var articleW = document.getElementById("results")[0];
for(var i = 0; i < info.length; i++)
{
var testDiv = document.createElement("results");
testDiv.append("<p><a href='https://en.wikipedia.org/?curid=" + query.pages[i].pageid + "' target='_blank'>" + query.info[i].title + "</a></p>");
testDiv.appendChild("<p><a href='https://en.wikipedia.org/?curid=" + query.info[i].pageid + "' target='_blank'>" + query.info[i].title + "</a></p>");
var newDiv = document.createElement("div");
var head = document.createDocumentFragment();
var newP1 = document.createElement("p");
var newP2 = document.createElement("p");
var newA = document.createElement("a");
head.appendChild(newP1);
newA.innerHTML = info[i].pages;
newA.setAttribute("href", info[i].pages);
newP1.appendChild(newA);
newP1.className = "head";
newP2.innerHTML = info[i].title;
newP2.className = "url";
newDiv.appendChild(head);
newDiv.appendChild(newP2);
articleWiki.appendChild(newDiv);
}
}
}
//
function createEventListener(){
var form = document.getElementsByTagName("form")[0];
if (form.addEventListener) {
form.addEventListener("submit", getWiki, false);
} else if (form.attachEvent) {
form.attachEvent("onsubmit", getWiki);
}
}
//createEventListener when the page load
if (window.addEventListener) {
window.addEventListener("load", createEventListener, false);
} else if (window.attachEvent) {
window.attachEvent("onload", createEventListener);
}
Mediawiki api link
https://en.wikipedia.org/w/api.php?action=query&format=json&gsrlimit=3&generator=search&origin=*&gsrsearch=

You are wrong some points.
1)
var articleW = document.getElementById("results")[0];
This is wrong. This will return a element is a reference to an Element object, or null if an element with the specified ID is not in the document. Doc is here (https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementById)
The correct answer should be :
var articleW = document.getElementById("results");
2)
var info = wikiReport.query;
for(var i = 0; i < info.length; i++) {}
The info is object . it is not array , you can't for-loop to get child value.
wikiReport.query is not correct wiki data. The correct data should be wikiReport.query.pages. And use for-in-loop to get child element
The correct answer:
var pages = wikiReport.query.pages
for(var key in pages) {
var el = pages[key];
}
3) This is incorrect too
testDiv.appendChild("<p><a href='https://en.wikipedia.org/?curid=" + query.info[i].pageid + "' target='_blank'>" + query.info[i].title + "</a></p>");
The Node.appendChild() method adds a node to the end of the list of children of a specified parent node. You are using the method to adds a string . This will cause error. Change it to node element or use append method instead
I have created a sample test.You can check it at this link below https://codepen.io/anon/pen/XRjOQQ?editors=1011

JavaScript error with splitting string into array

I am running into an issue with splitting a string into an array. To help myself troubleshoot the problem, I included two alert() functions, but only one gets called. Therefore, I know that there is an issue splitting a string into an array (for a basic username/password check). Here is my JS code:
function check() {
var user = document.loginform.usr.value;
var pass = document.loginform.psw.value;
var valid = false;
var txt = new XMLHttpRequest();
var alltext = "";
var allLines = [];
var usrn = [];
var pswd = [];
txt.open("GET", "/c.txt", true);
alltext = txt.responseText;
allLines = alltext.split(/\r\n|\n/);
usrn = allLines[0].split(',');
alert("usrn split");
pswd = allLines[1].split(',');
alert("pswd split");
for (var i=0; i <usrn.length; i++) {
if ((user == usrn[i]) && (pass == pswd[i])) {
valid = true;
break;
}
}
if(valid) {
window.location = "test.html";
return false;
}else{
var div = document.getElementById("login");
div.innerHTML = '<font color="red" size=2><i>Invalid Username/Password!</i></font><br>' + div.innerHTML;
}
}
The file that contains the login credentials (c.txt) is as follows:
User1,User2
pass,password
When User1 enters his/her name into the form, the password should be "pass". However, the script gets stopped at "pswd = allLines[1].split(',');". Am I misunderstanding the lines array?
Any help is appreciated - thanks!

You need to either use a synchronous call by changing the line to
txt.open("GET", "/c.txt", false);
Or use the "onreadystatechange" event to get the response when the server returns it
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
alltext = txt.responseText;
allLines = alltext.split(/\r\n|\n/);
usrn = allLines[0].split(',');
alert("usrn split");
pswd = allLines[1].split(',');
alert("pswd split");
for (var i=0; i <usrn.length; i++) {
if ((user == usrn[i]) && (pass == pswd[i])) {
valid = true;
break;
}
}
if(valid) {
window.location = "test.html";
return false;
}else{
var div = document.getElementById("login");
div.innerHTML = '<font color="red" size=2><i>Invalid Username/Password!</i></font><br>' + div.innerHTML;
}
}
}

You need to call txt.send(). Also it is async so txt.responseText will most likely be null.
You can use onreadystatechanged like so to ensure that txt.responseText has a value:
txt.onreadystatechange = function() {
if (txt.readyState == 4) { // 4 = DONE
alert(txt.responseText);
}
}

Okay - after fiddling with the code and doing some more research, I got a working script. This script takes data from a form and checks it against a file (c.txt). If the form entries match a username/password combination in c.txt, it takes you to another webpage.
function check() {
var user = document.loginform.usr.value;
var pass = document.loginform.psw.value;
var valid = false;
var txt;
if(window.XMLHttpRequest){
txt = new XMLHttpRequest();
}else{
txt = new ActiveXObject("Microsoft.XMLHTTP");
}
var allLines = [];
var usrn = [];
var pswd = [];
txt.onreadystatechange=function() {
if(txt.readyState==4 && txt.status==200){
var alltext = txt.responseText;
allLines = alltext.split(/\r\n|\n/);
usrn = allLines[0].split(',');
pswd = allLines[1].split(',');
for (var i=0; i <usrn.length; i++) {
if ((user == usrn[i]) && (pass == pswd[i])) {
valid = true;
break;
}
}
if(valid) {
window.location = "test.html";
return false;
}else{
var div = document.getElementById("login");
div.innerHTML = '<font color="red" size=2><i>Invalid Username/Password!</i></font><br>' + div.innerHTML;
}
}
}
txt.open("GET", "c.txt", false);
txt.send();
}

JavaScript extracting data from XML (if else statement not working)

So my problem in the code below is in the following if else if statement at the bottom:
1. the code in both of the if statements work perfect.
2. the issue is that when i run the code on one can be use.
if i do 2 separate if statements only the second one works.
if i do 1 if and one else if only the if statement works and the else if does nothing.
a little more info: what I'm trying to do is every time the function times out and loops through again it will check the if statements and if something changed to run the appropriate if clause.
PLEASE LET ME KNOW IF MORE INFO IS NEEDED.
var xmlHttp = createXmlHttpRequestObject();
function createXmlHttpRequestObject()
{
var xmlHttp;
if(window.ActiveXObject)
{
try
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}catch(e)
{
xmlHttp = false;
}
}
else
{
try
{
xmlHttp = new XMLHttpRequest();
}catch(e)
{
xmlHttp = false;
}
}
if(!xmlHttp)
alert("cant create object");
else
return xmlHttp;
}
function process_search()
{
if(xmlHttp.readyState==0 || xmlHttp.readyState==4)
{
search_parameter = encodeURIComponent(document.getElementById("userInput").value);
search_type = encodeURIComponent(document.getElementById("userOptions").value);
xmlHttp.open("GET", "../pages/search_xml.php?search_parameter=" + search_parameter + "&search_type=" + search_type, true);
xmlHttp.onreadystatechange = handleServerResponse;
xmlHttp.send(null);
}
else
{
setTimeout('process_search()',5000);
}
}
function handleServerResponse()
{
if(xmlHttp.readyState==4)
{
if(xmlHttp.status==200)
{
xmlResponse = xmlHttp.responseXML;
root = xmlResponse.documentElement;
if(document.getElementsByTagName('find_users')) // FIND USERS
{
first_name = root.getElementsByTagName('first');
last_name = root.getElementsByTagName('last');
users = document.createElement('ul');
users.setAttribute("id", "usersFound");
document.getElementById("underInput").innerHTML = ""; //RESETS THE DIV BEFORE INSERTING DATA
for(var i=0; i< first_name.length; i++)
{
usersList = document.createElement('li');
t = document.createTextNode(first_name.item(i).firstChild.data + " - " + last_name.item(i).firstChild.data + "<br/>");
usersList.appendChild(t);
underInput = document.getElementById("underInput");
underInput.appendChild(usersList);
}
}else if(document.getElementsByTagName('find_config_item')) //FIND CONFIG ITEMS
{
item = root.getElementsByTagName('item');
desc = root.getElementsByTagName('description');
itemsList = document.createElement('ul');
itemsList.setAttribute("id", "itemsFound");
document.getElementById("underInput").innerHTML = ""; //RESETS THE DIV BEFORE INSERTING DATA
for(var i=0; i< item.length; i++)
{
itemList = document.createElement('li'); // CREATE LIST ITEM ELEMENT
t = document.createTextNode(item.item(i).firstChild.data + " - " + desc.item(i).firstChild.data + "<br/>");
itemList.appendChild(t);
underInput = document.getElementById("underInput");
underInput.appendChild(itemList);
}
}
setTimeout('process_search()', 5000);
}
else
{
alert("something is wrong");
}
}
}

You shouldn't really rely on try/catch for this use case. You can be fairly certain the XMLHttpRequest or a Mircrosoft.XMLHTTP object will exist so you could simplify your code to the following:
function createXmlHttpRequestObject () {
return window.XMLHttpRequest ? new XMLHttpRequest() : new XDomainRequest();
}
var xmlHttp = createXmlHttpRequestObject();
Let me know if you would like to see a non ternary version

jquery doesn't get loaded, if i don't reload page

This code works only if I reload/refresh page, otherwise it doesn't work, I susspect issue is, because I use Jquery + normal javascript.
I have form and there is input which uses autocomplete, but while you go trough form next, it doesn't work.
The point is that input with #SchoolName isn't on first page is on 2nd page (after showcart(); function is trigered)...
Anyone have any ideas why my jquery code doesn't load properly?
I have this code:
<script type="text/javascript" language="javascript">
function autocomplete() {
$("#SchoolName").autocomplete("ajaxFuncs.php", {
cacheLength:1,
mustMatch:1,
extraParams: {getSchoolName:1}
});
};
$(document).ready(function(){
setTimeout("autocomplete()", 500);
});
function showVal(str) {
if (str == "") {
document.getElementById("txtHint").innerHTML = "* Please type in School Name.";
return;
}
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4) {
if (xmlhttp.status == 200) { // break this into 2 statements so you can handle HTTP errors
document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
} else {
document.getElementById("txtHint").innerHTML = "AJAX Error (HTTP "+xmlhttp.status+")";
}
}
}; // functions declared in this way should be followed by a semi colon, since the function declaration is actually a statement.
// encodeURIComponent() does all the escaping work for you - it is roughly analogous to PHP's urlencode()
// xmlhttp.open("GET","ajaxFuncs2.php?q="+encodeURIComponent(str),true);
xmlhttp.open("GET","ajaxFuncs2.php?q="+encodeURIComponent(str),true);
xmlhttp.send();
}
</script>
<script>
function ajax(doc)
{
doc = null;
if (window.XMLHttpRequest) {
try {
doc = new XMLHttpRequest();
}
catch(e) {
if(SBDebug)
alert("Ajax interface creation failure 1");
}
}
else if (window.ActiveXObject) {
try {
doc = new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e) {
try {
doc = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e) {
if(SBDebug)
alert("Ajax interface creation failure 2");
}
}
}
return doc;
}
function postIt(params) {
var doc;
// alert("postIt: " + params);
if(params == "")
params = "nada=0";
doc = ajax(doc);
if (doc) {
var url = window.location.href;
url = url.substr(0, url.lastIndexOf("/") + 1) + "clientCartPost.php";
// alert(url);
doc.open("POST", url, false);
//Send the proper header information along with the request
doc.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
doc.setRequestHeader("Content-length", params.length);
doc.setRequestHeader("Connection", "close");
document.body.style.cursor = "wait";
doc.send(params);
document.body.style.cursor = "default";
if(doc.responseText == "timeout") {
alert("Timed out");
document.location = "index.php";
}
return doc.responseText;
}
return "Connection Failed";
}
function saveCC() {
var doc;
doc = ajax(doc);
if(params == "")
params = "nada=0";
if (doc) {
var params = "";
var eVisi = document.getElementById("visiCard");
var eCard = document.getElementById("x_card_num");
if(eVisi.value.indexOf("*") < 0)
eCard.value = eVisi.value;
for(i=0; i<document.CC.elements.length; i++) {
if(document.CC.elements[i].name == "visiCard")
continue;
params += getElemValue(document.CC.elements[i]) + "&";
}
doc.open("POST", "https://dot.precisehire.com/clientCartStoreCard.php", false);
//Send the proper header information along with the request
doc.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
doc.setRequestHeader("Content-length", params.length);
doc.setRequestHeader("Connection", "close");
document.body.style.cursor = "wait";
doc.send(params);
document.body.style.cursor = "default";
// alert(doc.responseText);
return true;
}
return false;
}
function getElemValue(item)
{
// alert("Getting: " + itemBase + itemID);
// alert(itemBase + "" + itemID);
if(item.type == "radio" || item.type == "checkbox")
{
if(!item.checked)
return "";
}
if(item.type == "select-one")
{
value = item.options[item.selectedIndex].value;
}
else
value = item.value;
return item.name + "=" + escape(value) + "&";
}
function makePie()
{
var contents = postIt("command=getProgress");
document.getElementById("step2").className = "bx2";
document.getElementById("step3").className = "bx2";
document.getElementById("step4").className = "bx2";
if(contents > 0)
document.getElementById("step2").className = "bx1";
if(contents > 1)
document.getElementById("step3").className = "bx1";
if(contents > 2)
document.getElementById("step4").className = "bx1";
}
var gbColor;
function RedIn(start)
{
var id;
if(start)
gbColor = 0;
gbColor += 32;
if(gbColor > 255)
gbColor = 255;
id = 0;
var obj = document.getElementById("red" + id);
while(obj != undefined)
{
obj.style.backgroundColor = 'rgb(255,' + gbColor + ',' + gbColor + ')';
id++;
obj = document.getElementById("red" + id);
}
if(gbColor < 255 && id > 0)
setTimeout("RedIn(0)", 100);
}
function showCart(next)
{
var ca = document.getElementById("cartArea");
var params = "";
for(i=0; i<document.clientCart.elements.length; i++)
{
param = getElemValue(document.clientCart.elements[i]);
if(param != "")
params += param + "&";
}
if(next)
params += "Next=1";
// alert(params);
ca.innerHTML = postIt(params);
makePie();
// RedIn(1);
}
function tabIfComplete(formField, maxSize, nextField, e)
{
if(window.event) // IE
{
keynum = e.keyCode;
}
else if(e.which) // Netscape/Firefox/Opera
{
keynum = e.which;
}
if(keynum < 48)
return;
if(formField.value.length >= maxSize)
{
var nf = document.getElementById(nextField);
if(nf)
nf.focus();
}
}
function sendCommand(command)
{
var ca = document.getElementById("cartArea");
var params = "command=" + command;
var submitOrder = command.indexOf('submitOrder') >= 0;
// alert(command);
if(submitOrder)
{
if(document.getElementById("RESULT").checked)
{
params += "&postSettlement=result";
/*
n = postIt(params);
alert(nOID);
if(nOID > 0)
document.location="orderreview.php?id=" + nOID;
return;
*/
}
else if(document.getElementById("REPORT").checked)
{
params += "&postSettlement=report";
}
else if(document.getElementById("DUPEORDER").checked)
{
params += "&postSettlement=dupeorder";
}
postIt(params);
document.location="cart.php";
return;
}
else if(command.indexOf('priorSearches') >= 0)
{
document.location="orderreview.php?ssnlist=1";
}
else if(command.indexOf('addState') >= 0)
{
for(i=0; i<document.clientCart.elements.length; i++)
{
if(document.clientCart.elements[i].name != "Next")
params += "&" + getElemValue(document.clientCart.elements[i]);
}
}
ca.innerHTML = postIt(params);
makePie();
}
function doReset()
{
var ca = document.getElementById("cartArea");
ca.innerHTML = "";
ca.innerHTML = postIt("reset=1");
makePie();
}
function dupeOrder()
{
var ca = document.getElementById("cartArea");
ca.innerHTML = "";
ca.innerHTML = postIt("dupeOrder=1");
makePie();
}
function resetCart()
{
if(confirm("Empty current cart and start over? Are you Sure?"))
doReset();
}
function saveCart()
{
var ca = document.getElementById("cartArea");
var params = "";
for(i=0; i<document.clientCart.elements.length; i++)
{
params += getElemValue(document.clientCart.elements[i]) + "&";
}
params += "saveExit=1";
ca.innerHTML = postIt(params);
makePie();
RedIn(1);
}
function deleteOrderItem(command)
{
if(!confirm("Delete this search? Are you Sure?"))
return;
var ca = document.getElementById("cartArea");
var params = "command=" + command;
ca.innerHTML = postIt(params);
makePie();
}
// alert("Reloaded");
setTimeout("showCart();", 100);
</script>

Try to move the last line:
setTimeout("showCart();", 100);
...into the $.ready-function:
$(document).ready(function(){
setTimeout("autocomplete()", 500);
});
Otherwise it may happen that showCart() gets called before the elements you access in showCart() are known.

First: Combining jQuery + regular javascript is not a problem -- jquery is made of regular javascript.
Secondly, when you're passing a method into your callback param anything, you can usually just write the name of the method:
$(document).ready(function(){
setTimeout(autocomplete, 500);
});
Third, the issue of using XMLHttpRequest while also using jquery. Jquery has a version of the XHR that is even more cross browser compliant than that is, you should use it:
$.ajax()
Finally, please add an include to the actual jquery file at the beginning of your code..
<script type="text/javascript" src="jquery.js"></script>

Sorry to say, while formatting your code its really pain to do.
I have seen some of issue right now:-
function autocomplete() { first this function has improver closing }; with semi-colon
Below is the repeatitive code:-
//Send the proper header information along with the request
doc.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
doc.setRequestHeader("Content-length", params.length);
doc.setRequestHeader("Connection", "close");
document.body.style.cursor = "wait";
doc.send(params);
document.body.style.cursor = "default";</li>
This you can make into a single function call by passing proper parameters.
3.If you are using JQuery then XMLHttpRequest is not required
4.Yet to update...

Open up a javascript console (Ctrl-Shift-J) in Firefox/Chrome and look in the menu bar for other browsers and see what errors show up