function ajF(criteria,val,div)
{
        var ajaxRequest;
        try{
                ajaxRequest = new XMLHttpRequest();
           }
        catch (e)
           {
               try
                {
                        ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
                }
                catch (e)
                {
                        try
                        {
                                ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
                        }
                        catch (e)
                        {
                                alert("Your browser broke!");
                                return false; 
                        }
                }
           }
        ajaxRequest.onreadystatechange = function()
        {
                if(ajaxRequest.readyState == 4)
                {
                        var ajaxDisplay = document.getElementById(div);

                        if (criteria=='quiz')
                        {
                                ajaxDisplay.innerHTML="<div id='quizcontent'><div id='quiz'></div></div>";
                                eval(ajaxRequest.responseText);
                        }
                        else if (criteria=="sendmail" || criteria=="vote" || criteria=="add_coment" || criteria=="delete_coment")
                        {
                                alert(ajaxRequest.responseText);
                        }
                        else if (criteria=="get_visit")
                        {
                        }
                        else    ajaxDisplay.innerHTML = ajaxRequest.responseText;
                }
        }
        var ordinator="?criteria="+criteria+"&val="+val+"&divul="+div;
        ajaxRequest.open("GET", "ajax.php"+ordinator, true);
        ajaxRequest.send(null);
}