function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
} 

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);



function toggleAdd(id) {
    if (document.getElementById('list_' + id + '_add_link').style.display == 'none') {
		 document.getElementById('list_' + id + '_add_link').style.display = 'block'
		 document.getElementById('list_' + id + '_add').style.display = 'none'
    } else {
		 document.getElementById('list_' + id + '_add_link').style.display = 'none'
		 document.getElementById('list_' + id + '_add').style.display = 'block'
    }
}

function toggleMovementControls() {
    controls = getSpansByStyleClass('movement_control');

    for (i = 0; i < controls.length; i++) {
        if (controls[i].style.display == 'none') {
            controls[i].style.display = 'inline';
        } else {
            controls[i].style.display = 'none';
        }
    }
}

function getSpansByStyleClass(className) {
    var all = document.all ? document.all : document.getElementsByTagName('SPAN');
    var elements = new Array();

    for (var e = 0; e < all.length; e++)
        if (all[e].className == className)
            elements[elements.length] = all[e];

    return elements;
}