xmlhttp.onreadystatechange=function()
{
	if(xmlhttp.readyState==4)
	{
		alert(xmlhttp.responseText);
		document.getElementById("info").innerHTML=xmlhttp.responseText;
	}
}
xmlhttp.open("GET","game.php?q=0",true);
xmlhttp.send(); //return grid



------



<?php
echo "HI";

?>