// JavaScript Document
function ajaxFunction()
{
var xmlHttp;
try {
xmlHttp=new XMLHttpRequest();

}

catch (e) {
try {
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
try {
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e) {
alert("Váš prohlížeč nepodporuje AJAX");
return false;
}
}
}
xmlHttp.onreadystatechange=function() {
if(xmlHttp.readyState==4) {
var x=document.getElementById("testik");
x.innerHTML = xmlHttp.responseText;
}
}
xmlHttp.open("GET","../online.php",true);
xmlHttp.send(null);
setTimeout('ajaxFunction()',3000); // 3 sec
}