var product_display_request = false;

/* don't 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);

}

var xmlHttp;

function GetXmlHttpObject(handler) { 

  var objXmlHttp=null

  if (navigator.userAgent.indexOf("Opera")>=0) {
    alert("This example doesn't work in Opera") 
    return; 
	}
  if (navigator.userAgent.indexOf("MSIE")>=0) { 
    var strName="Msxml2.XMLHTTP"
    if (navigator.appVersion.indexOf("MSIE 5.5")>=0) {
      strName="Microsoft.XMLHTTP"
    } 
    try { 
      objXmlHttp=new ActiveXObject(strName)
      objXmlHttp.onreadystatechange=handler 
      return objXmlHttp
    } 
    catch(e) { 
      alert("Error. Scripting for ActiveX might be disabled") 
      return 
    } 
  } 
  if (navigator.userAgent.indexOf("Mozilla")>=0) {
    objXmlHttp=new XMLHttpRequest()
    objXmlHttp.onload=handler
		objXmlHttp.onerror=handler 
    return objXmlHttp
	}

} 

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);
        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
  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 don't change */

active_div = "";

function display_product(subcategory_id) {

  url = "tpl/product_template.tmp.php?id="+subcategory_id;
	
	parameters = "?subcategory_id=" + subcategory_id;
	
	if (active_div != "") { 
	  document.getElementById(active_div).innerHTML = '';
	  document.getElementById(active_div).style.display="none";
	}
	
	document.getElementById('subcategory' + subcategory_id).innerHTML = "Retrieving product...";
	
	active_div = 'subcategory' + subcategory_id;

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

  product_display_request.onreadystatechange = update_products;
	//resetClock();
	
	post_request(product_display_request, url, parameters);
	
}

function update_products() {

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

}