Having trouble connecting to a website using JavaScript code

Recently, I've been working on a Javascript code that pings Google every 10 seconds and displays the connection status in an HTML MonitorInformation element. However, whenever I try to debug the HTML file, the information displayed is always stuck at "Connecting...wait". I've spent some time trying to troubleshoot this issue but haven't been able to figure it out. Any thoughts on what might be going wrong with my code?

Below are the snippets of my HTML and Javascript code:

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="Monitor.js" type="text/javascript"></script>
    <title>Web Site Monitor</title>
</head>
<body  onload="setup()">
<div id="MonitorInformation">Connecting...wait</div>
</body>
</html>

Javascript code excerpt:

function setup() {
    window.setInterval(PingWebSite, (10 * 1000));
}

function PingWebSite() {
    conObj = new ActiveXObject("Msxml2.XMLHTTP");
    //...
}

After reviewing, I made some modifications using JSON, as shown below:

function setup() {
    window.setInterval(PingWebSite, (10 * 1000));
}

function PingWebSite() {
    var http_request = new XMLHttpRequest();
    //...
}

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="Monitor.js" type="text/javascript"></script>
    <title>Web Site Monitor</title>
</head>
<body  onload="setup()">
<div id="MonitorInformation">Connecting...wait</div>
</body>
</html>

If you have any insights or suggestions, please feel free to share them.

Answer №2

As far as I know, it is not possible to perform cross-domain XHR requests if you do not have access.

Answer №3

To work around cross-domain limitations, you can utilize a hidden iframe. Here's a simple example to help you get started:

(HTML Snippet)

<body>
    <div style="display: none;">
        <iframe id='hiddenFrame'></iframe>
    </div>
</body>

Javascript:

function initialize()
{
    var iFrame = document.getElementById('hiddenFrame');
    var changeCallback = function () 
    { 
        status.innerText = "Service is Accessible";
    }
    // For Internet Explorer
    iFrame.onload = changeCallback;
    // For Firefox
    iFrame.onreadystatechange = changeCallback;

    setInterval(PingWebsite, (15 * 1000));
}

function PingWebsite() {
    var iFrame = document.getElementById('hiddenFrame');
    iFrame.src = 'http://www.example.com';
}

Answer №4

Did you possibly overlook adding a semicolon in that section? For example: ...body onload="setup();"...

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