Ajax caching the webpage?

[redbrad0]

I have a ajax script which calls the content of another webpage and just displays the content in a alert (its just the unix timestamp). Even though the time is changing, ajax does not report the new time until I load the page in my browser. How can I keep this so it does not cache the page? I need it to load a new version everytime.

Main Page - test.php

<SCRIPT language=JavaScript type=text/javascript>

function createXHR() 
{
    var request = false;
        try {
            request = new ActiveXObject('Msxml2.XMLHTTP');
        }
        catch (err2) {
            try {
                request = new ActiveXObject('Microsoft.XMLHTTP');
            }
            catch (err3) {
		try {
			request = new XMLHttpRequest();
		}
		catch (err1) 
		{
			request = false;
		}
            }
        }
    return request;
}

function loadHTML(theURL)
{
	var xhr = createXHR();
	xhr.onreadystatechange=function()
	{ 
		if(xhr.readyState == 4)
		{
			if(xhr.status == 200)
			{
				SessionTimeout = xhr.responseText;
			}
		} 
	}; 

	xhr.open("GET", theURL , true);
	xhr.send(null);
	
	alert(SessionTimeout);
}

var SessionTimeout = "";
</SCRIPT>

<INPUT type="BUTTON" value="Read Timestamp" ONCLICK="loadHTML('test2.php')"></p>

Requested Page - test2.php

<?
echo time();
?>

[hsriat]

Try this..
[CODE=javascript]
<SCRIPT language=JavaSc ript type=text/javascript>
function createXHR()
{
var request = false;
try {
request = new ActiveXObject(' Msxml2.XMLHTTP' );
}
catch (err2) {
try {
request = new ActiveXObject(' Microsoft.XMLHT TP');
}
catch (err3) {
try {
request = new XMLHttpRequest( );
}
catch (err1)
{
request = false;
}
}
}
return request;
}

function loadHTML(theURL )
{
var xhr = createXHR();
xhr.onreadystat echange=functio n()
{
if(xhr.readySta te == 4)
{
if(xhr.status == 200)
{
alert(xhr.respo nseText);
}
}
};

xhr.open("GET", theURL , true);
xhr.send(null);
}

</SCRIPT>
[/CODE]

Tell me if it works, else I'll tell you another solution.

[acoder]

Use the date/time to make the URL unique to force a new page, e.g. theURL+"?t="+(n ew Date()).getTime ().