var carthttp = false;

if(navigator.appName == "Microsoft Internet Explorer") {
  carthttp = new ActiveXObject("Microsoft.XMLHTTP");
} else {
  carthttp = new XMLHttpRequest();
}


function addtocart(type, itemid, quantity) {

  //alert (itemid+' - '+quantity+' - '+price+' - '+itemname);

      document.getElementById('added'+itemid).innerHTML = '<span class="adding">Adding...</span>';    
      document.getElementById(itemid).disabled=true;

randno = Math.floor(Math.random()*999999)
  carthttp.abort();
  carthttp.open("GET", "/cartactions.php?action=add&type="+type+"&itemid="+itemid+"&quantity="+quantity+"&rand="+randno, true);
  carthttp.onreadystatechange=function() {
    if(carthttp.readyState == 4) { // Added to cart
      
      if (carthttp.responseText == 'NoStock') {
        alert('We do not currently have enough stock of this item. Please order a smaller quantity.');
        document.getElementById('added'+itemid).innerHTML = '';
        document.getElementById(itemid).disabled=false;
        document.getElementById(itemid).value = 'Add';
      }
      
      else {
      
        document.getElementById('cartinfo').innerHTML = carthttp.responseText;
        document.getElementById('added'+itemid).innerHTML = '<span class="added">Added</span>';
        document.getElementById(itemid).disabled=false;
        document.getElementById(itemid).value = 'Add More';
         document.getElementById('checkout'+itemid).style.display='none';        
      }

    }
  }
  carthttp.send(null);


}