/* do not change */

function init_post_request() {

  this.fn_request = false;

  if (window.XMLHttpRequest) { // Mozilla, Safari,...
    this.fn_request = new XMLHttpRequest();
    if (this.fn_request.overrideMimeType) {
      this.fn_request.overrideMimeType('text/html');
    }
  }
  else if (window.ActiveXObject) { // IE
    try {
      this.fn_request = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
       try {
         this.fn_request = new ActiveXObject("Microsoft.XMLHTTP");
       } catch (e) {}
    }
  }
  if (!this.fn_request) {
    alert('Cannot create XMLHTTP instance');
    return false;
  }

}

function post_request(obj, url, parameters) {

  obj.open('POST', url, true);
  obj.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  obj.setRequestHeader("Content-length", parameters.length);
  obj.setRequestHeader("Connection", "close");
  obj.send(parameters);

}

function build_query(frm) {
  var str = "";
  var element, i = 0;
  while ((element = document.getElementById(frm).elements[i++]) != null) {
      var qc = toQueryComponent(element);
      if (qc != "") str += "&" + qc;
  }
  return str.substring(1);
}

function toQueryComponent(input) {
    if (!input.name || input.disabled)
        return "";

    var n = urlencode(input.name);

    switch (input.type) {
    case "text":
    case "password":
    case "submit":
    case "hidden":
        return n + "=" + urlencode(input.value);
    case "textarea":
        // normalize line breaks as CR LF pairs as per RFC 1866
        var v = input.value.split(/\r\n|\r|\n/).join("\r\n");
        return n + "=" + urlencode(v);
    case "checkbox":
    case "radio":
        if (!input.checked)
            return "";
        //var v = getRealValue(input);
        var v = input.value;
        if (v === null) v = "on";
        return n + "=" + urlencode(v);
    case "select-one":
    case "select-multiple":
        var nvp = [];
        var opt, i = 0;
        while ((opt = input.options[i++]) != null) {
            if (opt.selected) {
                var v = getRealValue(opt);
                if (v === null) v = opt.text;
                // older versions of IE do not support Array.push
                nvp[nvp.length] = n + "=" + urlencode(v);
            }
        }
        return nvp.join("&");
    default:
        // input types reset, button, image, and file not implemented
        return "";
    }
}

function urlencode(str) {
    var v;
    try { v = encodeURIComponent(str); } catch (e) { v = escape(str); }
    return v.replace(/%20/g,"+");
}

function getRealValue(input) {
    var attr = input.getAttributeNode("value");
    return (attr && attr.specified) ? input.getAttribute("value") : null;
}

function launch_js(data) {
  // RegExp from prototype.sonio.net

  data = data.replace("<!--", "");
  data = data.replace("-->", "");

  var ScriptFragment = '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)';

  var match    = new RegExp(ScriptFragment, 'img');
  var scripts  = data.match(match);

    if(scripts) {
        var js = '';
        for(var s = 0; s < scripts.length; s++) {
            var match = new RegExp(ScriptFragment, 'im');
            js += scripts[s].match(match)[1];
        }
        eval(js);
    }
}

/* end of do not change  */
var sc_request;

function get_shopping_cart() {

  var url   = "/ajax/shopping_cart.ajx.php";
  var query = "cmd=get_shopping_cart";

  tmp_http_req   = new init_post_request();
  sc_request     = tmp_http_req.fn_request;

  sc_request.onreadystatechange = display_shopping_cart;

  post_request(sc_request, url, query);

}

function display_shopping_cart() {

  if (sc_request.readyState == 4 || sc_request.readyState == "complete") {
    data = sc_request.responseText;
    document.getElementById('shopping_cart').innerHTML = data;
    document.getElementById('shopping_cart').style.display = "block";
  }

}

function update_shopping_cart() {

  var url   = "/ajax/shopping_cart.ajx.php?cmd=update_shopping_cart";
  var query = build_query('charmed_shopping_cart');

  tmp_http_req   = new init_post_request();
  sc_request     = tmp_http_req.fn_request;

  sc_request.onreadystatechange = display_shopping_cart;

  post_request(sc_request, url, query);

}

function close_shopping_cart() {
  document.getElementById('shopping_cart').innerHTML = "";
  document.getElementById('shopping_cart').style.display = "none";
}

function show_newsletter_rego() {
  document.getElementById('newsletter_rego').style.display = 'block';
}

function hide_newsletter_rego() {
  document.getElementById('newsletter_rego').style.display = 'none';
}

var subs_req;

function subscribe_to_newsletter(var_subsname,var_subsemail) {

  var url   = "/ajax/newsletter_subscription.ajx.php";
  var query = "subs_name=" + var_subsname + "&subs_email=" + var_subsemail;

  tmp_http_req   = new init_post_request();
  subs_req       = tmp_http_req.fn_request;

  subs_req.onreadystatechange = update_subscription_box;

  post_request(subs_req, url, query);

}

function update_subscription_box() {

  if (subs_req.readyState == 4 || subs_req.readyState == "complete") {
    data = subs_req.responseText;
    if (data.indexOf('Thank you')) {
      alert(data);
    }
    else {
      document.getElementById('newsletter_rego').innerHTML = data;
    }
  }

}

var pro_details_req;

function get_product_details(img, img_type) {

  var url   = "/gallery";
  if (img_type == "collection") {
    var url   = "/collection";
  }
  var query = "cmd=get_product_details&img=" + img;

  tmp_http_req    = new init_post_request();
  pro_details_req = tmp_http_req.fn_request;

  pro_details_req.onreadystatechange = update_product_details;

  post_request(pro_details_req, url, query);

}

function update_product_details() {
  if (pro_details_req.readyState == 4 || pro_details_req.readyState == "complete") {
    data = pro_details_req.responseText;
    document.getElementById('gallery_box').innerHTML = data;
    launch_js(data);
    document.getElementById('gallery_box').style.display = "block";
  }
}

var popup_req;

function get_popup(popup_id, url) {

  var query = "cmd=get_popup&popup_id=" + popup_id;

  tmp_http_req = new init_post_request();
  popup_req    = tmp_http_req.fn_request;

  popup_req.onreadystatechange = update_popup_content;

  post_request(popup_req, url, query);

}

function update_popup_content() {
  if (popup_req.readyState == 4 || popup_req.readyState == "complete") {
    data = popup_req.responseText;
    document.getElementById('popup').innerHTML = data;
    launch_js(data);
    document.getElementById('popup').style.display = "block";
  }
}