/* 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 image_req ="";
var active_id = active_id_1 = "cat_div_0";
function show_image(cat_id, cunt, cat_name) {
  active_id = "cat_div_" + cunt;
	
  var url   = "/ajax/show_image.ajx.php?cat_id=" + cat_id + "&cat_name=" + cat_name;
	query = "";
	document.getElementById("image_nav").innerHTML = "loading...";
	document.getElementById(active_id).style.backgroundColor = "#cccccc";
	tmp_http_req = new init_post_request();
	image_req  = tmp_http_req.fn_request;
	image_req.onreadystatechange = update_image;		
	post_request(image_req, url, query);
	 
}

function update_image() {
  if (image_req.readyState == 4 || image_req.readyState == "complete")  {  			    	
		if (active_id_1 != "") {			
			document.getElementById(active_id_1).style.backgroundColor = "#D8D7D7";					
		}		
		active_id_1 = active_id;
		data = image_req.responseText;			
		document.getElementById("image_nav").innerHTML = data;
		launch_js(data);
  }
}

var subscribe_req ="";
function subscribe(){
	email_add = document.getElementById("subsribe_email").value;
	subscriber = document.getElementById("subsribe_name").value;
	if (email_add.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) == -1){
		alert("Please enter a valid email address.")
		return false;
	}else{
		var url   = "/index.php?cmd=subscribe&email=" + email_add + "&name=" + subscriber;
		query = "";
		document.getElementById("subscribe_tb").innerHTML = "Saving...";		
		tmp_http_req = new init_post_request();
		subscribe_req  = tmp_http_req.fn_request;
		subscribe_req.onreadystatechange = update_subscribe;		
		post_request(subscribe_req, url, query);
	}	
}
function update_subscribe() {
  if (subscribe_req.readyState == 4 || subscribe_req.readyState == "complete")  {  			    			
		data = subscribe_req.responseText;			
		document.getElementById("subscribe_tb").innerHTML = data;		
  }
}

var map_update_req = ""

function update_map(map_id) {	

	var url   = "/ajax/maps.ajx.php?map_id=" + map_id;
  var query = "";
	document.getElementById('map_details').innerHTML = "Loading...";
  tmp_http_req    = new init_post_request();
  map_update_req = tmp_http_req.fn_request;

  map_update_req.onreadystatechange = update_map_details;

  post_request(map_update_req, url, query);

}

function update_map_details() {

	if (map_update_req.readyState == 4 || map_update_req.readyState == "complete") {
    data = map_update_req.responseText;
		document.getElementById('map_details').innerHTML = data;
		launch_js(data);
	}

}