var h = '../admin/catsBrowse.php?';
var q = '';
var s = '';

function listCat(x){
  var cats = document.getElementsByTagName('input');
  for(var i = 0; i<cats.length; i++){
    if(cats[i].value == x){
      cats[i].checked = true;
    }else{
      cats[i].checked = false;
    }
  }
  getCats();
}

function listLoc(x){
  window.location='map.php?id='+x;
}

function toggleAll(o){
  if(o=='on'){
    var value = true;
  }else{
    var value = false;
  }
  var cats = document.getElementsByTagName('input');
  for(var i = 0; i<cats.length; i++){
    cats[i].checked = value;
  }
  getCats();
}

function getSelected(){
  var media = document.getElementsByName('m');
  var cats = document.getElementsByName('s');
  var catsArr = new Array;
  var mArr = new Array;

  for(var i = 0; i<cats.length; i++){
    if(cats[i].checked){
      catsArr.push(cats[i].value);
    }
  }

  for(var i = 0; i<media.length; i++){
    if(media[i].checked){
      mArr.push(media[i].value);
    }
  }
  if(mArr.length>0){
    var med = '&media='+mArr;
  }else{
    var med = '';
  }
  var ret = '&set='+catsArr+med;

  return ret;
}

function getCats(){
  var x = getSelected();
  q = 'action=topic'+x;
  var req = h+q+s;
  send(req);
}

function sort(x){
  s = '&sort='+x;
  var req = h+q+s;
  send(req);
}

function send(req){
  xmlHttp=ajaxFunction();
  xmlHttp.onreadystatechange=d;
  xmlHttp.open("GET",req,true);
  xmlHttp.send(null);
}

function d() 
{
  if (xmlHttp.readyState==4)
  { 
    document.getElementById('display').innerHTML = xmlHttp.responseText;
    window.location.hash="display";
  }
}

function ajaxFunction()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    try
      {
      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
    catch (e)
      {
      alert("Your browser does not support AJAX!");
      return false;
      }
    }
  }
return xmlHttp;
}