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First time using ajax, having problems.

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#1 smokehut

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Posted 18 May 2013 - 08:50 PM

What I'm trying to do in a nutshell is create a full 5 step interaction between a user and a "host" on my site, without the need for one refresh, as I designed my website for fast-linking with #tag for selecting pages. so if a refresh occurs it's back to the home page :P.


Basically, what I've got.



// Customise those settings

var seconds = 5;
var divid = "timediv";
var url = "boo.php";

// Refreshing the DIV

function refreshdiv(){

// The XMLHttpRequest object

var xmlHttp;
xmlHttp=new XMLHttpRequest(); // Firefox, Opera 8.0+, Safari
catch (e){
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); // Internet Explorer
catch (e){
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
catch (e){
alert("Your browser does not support AJAX.");
return false;

// Timestamp for preventing IE caching the GET request

fetch_unix_timestamp = function()
return parseInt(new Date().getTime().toString().substring(0, 10))

var timestamp = fetch_unix_timestamp();
var nocacheurl = url+"?t="+timestamp;

// The code...


// Start the refreshing process

var seconds;
window.onload = function startrefresh(){

Then, boo.php

/*$query = "SELECT * FROM deposits WHERE user = ? AND completed = 0";
$stmt = $db->prepare($query);
$stmt->bindValue(1, $user_data['username']);

$fetch = $stmt->fetch(PDO::FETCH_ASSOC);*/

// Format time output

$str = "It is %a on %b %d, %Y, %X - Time zone: %Z";

// Echo results



^ Above is what I'm trying to achieve, but I cannot even get it to echo the time in my other php form that requires the script.

<script src="ajax.js"></script>

<strong>This is the current date and time (updates every 5 seconds):</strong>

<script type="text/javascript"><!--
// --></script>
<div id="timediv"></div>

Can anyone point a beginner in the right direction?



#2 Muddy_Funster

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Posted 20 May 2013 - 03:31 PM

I'd like to point you to jquery. as a beginner your would be better off starting to learn that than oldschool "raw" javascript - especially for ajax.


another thing - you seem to have commented out the part of the script that actually calls the function....

Please: "This doesn't work..." is not a question.  We're not the government: we don't have anything to view what your doing on your computer.  Help us help you by asking a good question.


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