getXMLHTTPRequest get php

[reboot22]

Hi guys, I finished my php gallery pagination and was wondering if its possible to use ajax getXMLHTTPRequest to click the next / prev links without a page refresh.

The gallery links look like this:

next gallery.php?page=1
prev gallery.php?page=0


Now this is what I was thinking.

Making a function for getXMLHTTPRequest

<script type="text/javascript">

function getXMLHTTPRequest() {

var req = false;    
try {
   req = new XMLHttpRequest();
}
catch (err) {

try {   
req = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (err) {
try {
  req = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (err) {
req = false;
}
}
}
return req;
}
</script>

Then make a new getXMLHTTPRequest();

<script type="text/javascript">
var screenshots = new getXMLHTTPRequest();
</script>

Next when the second page is requested i want it to retrieve it like this:

<script type="text/javascript">
function next(id)
{
if (screenshots) {
	try {
	var url = "gallery.php";
	var query = url + "?page=" + id;
	
screenshots.open("GET", query, true);
screenshots.send(null);
}
catch (e) {
	alert ("Unable to connect to the server:\n" + e.toString());
}
} else {
alert ("end");
}
}

Im really new to ajax but I would love to know if its possible and how to do it.
Thanks for any info ore examples.