function getHTTPObject()
  {
    var xmlhttp;

    if (window.XMLHttpRequest)
    {
      xmlhttp = new XMLHttpRequest();
    }
    else if (window.ActiveXObject)
    {
      xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

      if (!xmlhttp)
      {
      xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
      }
    }

    return xmlhttp;
  }

  var xmlHttp = getHTTPObject();

  function checkStock(product_ids)
  {
    var url = "/checkstock_ajax.php?products=" + escape(product_ids);

    xmlHttp.open("GET", url, true);

    xmlHttp.onreadystatechange = alertOnStock;

    xmlHttp.send(null);
  }

  function checkBasketStock(product_ids)
  {
    var url = "/checkstock_ajax.php?products=" + escape(product_ids);

    xmlHttp.open("GET", url, true);

    xmlHttp.onreadystatechange = alertOnBasketStock;

    xmlHttp.send(null);
  }

  function alertOnStock()
  {
   if (xmlHttp.readyState == 4)
   {
      var tool = xmlHttp.responseText;

      stocks = tool.split('*-*');

      for(loop=0;loop<stocks.length;loop++)
      {
        indStock = stocks[loop].split('-|-');

        if(indStock[0] != '')
        {
          if(parseInt(document.getElementById('qty['+indStock[0]+']').value) > parseInt(indStock[1]) && parseInt(indStock[1]) != -1)
          {
            alert(indStock[2]+'\n\nSorry, we currently only have '+indStock[1]+' of this item in stock - your basket has been updated accordingly');
            document.getElementById('qty['+indStock[0]+']').value = indStock[1];
          }
        }
      }
    }
  }

  function alertOnBasketStock()
  {
   if (xmlHttp.readyState == 4)
   {
      var tool = xmlHttp.responseText;

      stocks = tool.split('*-*');

      for(loop=0;loop<stocks.length;loop++)
      {
        indStock = stocks[loop].split('-|-');

        if(indStock[0] != '')
        {
          if(parseInt(document.getElementById('qty['+indStock[0]+']').value) > parseInt(indStock[1]) && parseInt(indStock[1]) != -1)
          {
            alert(indStock[2]+'\n\nSorry, we currently only have '+indStock[1]+' of this item in stock - your basket has been updated accordingly');
            document.getElementById('qty['+indStock[0]+']').value = indStock[1];
          }
        }
      }
      document.frmBasket.submit();
    }
  }