Chat.html
---------
<html>
<head>
<script type="text/javascript">
function showUser(str)
{
if (str=="")
{
document.getElementById("chat").innerHTML="";
return;
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("chat").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","chat.php?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<form name="form">
<input type="text" id="text">
<input type='submit' onclick="showUser(document.form.getElementById("text").value)">
</form>
<div id="chat">cdffdsfafs</div>
</body>
</html>
-------
Chat.php
-------
<?php
$response="VLOL";
echo $response;
?>