/* name - name of the cookie
value - value of the cookie
[expires] - expiration date of the cookie (defaults to end of current session)
[path] - path for which the cookie is valid (defaults to path of calling document)
[domain] - domain for which the cookie is valid (defaults to domain of calling document)
[secure] - Boolean value indicating if the cookie transmission requires a secure transmission
 an argument defaults when it is assigned null as a placeholder
 a null placeholder is not required for trailing omitted arguments */

function setCookie(name, value, expires, path, domain, secure) 
{
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

/* name - name of the desired cookie
 return string containing value of specified cookie or null if cookie does not exist
*/

function getCookie(name) 
{
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) 
  {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } 
  else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

/* name - name of the cookie
[path] - path of the cookie (must be same as path used to create cookie)
[domain] - domain of the cookie (must be same as domain used to create cookie)
 path and domain default if assigned null or omitted if no explicit argument proceeds
*/

// date - any instance of the Date object
// hand all instances of the Date object to this function for "repairs"

function fixDate(date) 
{
  var base = new Date(0);
  var skew = base.getTime();
  if (skew > 0)
    date.setTime(date.getTime() - skew);
}


//this writes the new quantity into the page
function write_to_field(pagecode, pageqty)
{
//alert ("in write to field");
  var found = false;
  var j = -1;

  while (found == false)
  {
    j += 1;
    if (document.form1.elements[j].name == pagecode)
    { 
      found = true;
      document.form1.elements[j].value = pageqty;
    }
  }
}

// adds an item to the cart
function additem (code)
{

  // Update the expiry time
  var now = new Date();
  fixDate(now);
  // cookie expires in 14 days
  now.setTime(now.getTime() + 14 * 24 * 60 * 60 * 1000);
  var qty = getCookie(code);
  if (!qty)
  {
    // 1st instance of this item
    qty = 1;
  }
  else
    qty = parseInt(qty) + 1;

  setCookie(code, qty, now);
  write_to_field(code, qty);
}

var src_loaded = true;