var xmlhttp1
var resp
var res = new Array();

function showHint1()
{
    xmlhttp1=GetXmlHttpObject();
    if (xmlhttp1==null)
    {
        alert ("Your browser does not support XMLHTTP!");
        return;
    }

    var url="countStudents.php";
    xmlhttp1.onreadystatechange=stateChanged1;
    xmlhttp1.open("GET",url,true);
    xmlhttp1.send(null);
}

function stateChanged1()
{
    if (xmlhttp1.readyState==4)
    {
        var resp=xmlhttp1.responseText;
        res=resp.split(",");
        document.getElementById("counter1").innerHTML=res[0];
        document.getElementById("counter2").innerHTML=res[1];
        document.getElementById("counter3").innerHTML=res[2];
    }
}

function GetXmlHttpObject()
{
    if (window.XMLHttpRequest)
    {
        // code for IE7+, Firefox, Chrome, Opera, Safari
        return new XMLHttpRequest();
    }
    if (window.ActiveXObject)
    {
        // code for IE6, IE5
        return new ActiveXObject("Microsoft.XMLHTTP");
    }
    return null;
}