function add2cart(pid)
{
  if (pid>0)
  {
    if(window.XMLHttpRequest) xmlhttp = new XMLHttpRequest();
    else if(window.ActiveXObject) xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    xmlhttp.onreadystatechange= function() { 
        if (xmlhttp.readyState==4)
            if (xmlhttp.status==200)
                Showit2(xmlhttp);
    }
    
    xmlhttp.open('GET','require/add2cart.php?pid='+pid,true);
    xmlhttp.send(null);
  }
}

function Showit2(req) {
  document.getElementById('winkelwagen_melding').style.display = 'block'; 
  document.getElementById('cart_recap').innerHTML = req.responseText;  
}