var is_opera = navigator.userAgent.indexOf('Opera') > -1;
var is_safari = navigator.userAgent.indexOf('AppleWebKit/') > -1;
var is_chrome = navigator.userAgent.indexOf('Chrome') > -1;
var is_firefox = navigator.userAgent.indexOf('Firefox') > -1;
var is_mac = navigator.platform.toLowerCase().indexOf('mac') > -1;
var is_linux = navigator.platform.toLowerCase().indexOf('linux') > -1;
var browser_ie6 = false;
var browser_ie7 = false;
var browser_ie8 = false;

/* Table rows */
jQuery(document).ready(function () {
  jQuery('table tr:even').addClass('even');
  jQuery('table tr:odd').addClass('odd');

  impressum.setup();
});


  /* Font size / CSS switch */
  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);


  var impressum = {
    setup: function () {

      jQuery('.impressum-container').css('display', 'none');

      jQuery('.impressum-link a').bind('click', function (event) {

        event.preventDefault();

        var index = jQuery('.impressum-link a').index(this);

        var parent = jQuery(this).parent();
        parent = jQuery(parent).parent();

        var impressum_container = jQuery(parent).find('.impressum-container')[index];

        if (jQuery(impressum_container).css('display') == 'none') {
          jQuery(impressum_container).css('display', 'block');
        } else {
          jQuery(impressum_container).css('display', 'none');
        }

      });
    }
  }