// Check if the visitor viewed the popup
// else set popupViewed to 1
// return true for viewed/false for not viewed
function popupViewed () {
  if (getCookie('popupViewed') == 1)
    return true;
  else {
    setPopupCookie('popupViewed', 1);
    return false;
  }
}

// Closes the popup window
function closeHover () {
  document.getElementById('hoverAd').style.visibility = "hidden";
  return true;
}

// Opens the popup window and places this in the middle
function openHover() {
  var x = 0;
  var y = 0;
  //IE height and width
  x = document.body.clientWidth/2;
  y = document.body.clientHeight/2;
  //NS height and width
  if (x == 0) x = window.innerWidth/2;
  if (y == 0) y = window.innerHeight/2;
  //set height and width
  document.getElementById('hoverAd').style.left = (x-400);
  document.getElementById('hoverAd').style.top  = (280); // y-300(standaard) original: 250
  document.getElementById('hoverAd').style.visibility = "visible";
  return true;
}

//popup
function popUp () {
  if (!popupViewed())
    openHover();
}


// ########## COOKIE FCUNTIONS ##########
function setCookie(name, value)
         {
         //If name is the empty string, it places a ; at the beginning
         //of document.cookie, causing clearCookies() to malfunction.
         if(name != '')
            expires = new Date();
            expires.setMonth(expires.getMonth() + 2);
            document.cookie = name + '=' + value + '; expires=' + expires.toGMTString();
         }

function setPopupCookie(name, value)
         {
         //If name is the empty string, it places a ; at the beginning
         //of document.cookie, causing clearCookies() to malfunction.
         if(name != '')
            expires = new Date();
            expires.setMinutes(expires.getMinutes() + 30);
            document.cookie = name + '=' + value + '; expires=' + expires.toGMTString() ;
         }

function getCookie(name)
         {
         //Without this, it will return the first value
         //in document.cookie when name is the empty string.
         if(name == '')
            return('');

         name_index = document.cookie.indexOf(name + '=');

         if(name_index == -1)
            return('');

         cookie_value =  document.cookie.substr(name_index + name.length + 1,
                                                document.cookie.length);

         //All cookie name-value pairs end with a semi-colon, except the last one.
         end_of_cookie = cookie_value.indexOf(';');
         if(end_of_cookie != -1)
            cookie_value = cookie_value.substr(0, end_of_cookie);

         //Restores all the blank spaces.
         space = cookie_value.indexOf('+');
         while(space != -1)
              {
              cookie_value = cookie_value.substr(0, space) + ' ' +
              cookie_value.substr(space + 1, cookie_value.length);

              space = cookie_value.indexOf('+');
              }

         return(cookie_value);
         }

function clearCookie(name)
         {
         expires = new Date();
         expires.setYear(expires.getYear() - 1);

         document.cookie = name + '=null' + '; expires=' + expires;
         }

function clearCookies()
         {
         Cookies = document.cookie;
         Cookie = Cookies;
         expires = new Date();
         expires.setYear(expires.getYear() - 1);

         while(Cookie.length > 0)
              {
              //All cookie name-value pairs end with a semi-colon, except the last one.
              Cookie = Cookies.substr(0, Cookies.indexOf(';'));
              Cookies = Cookies.substr(Cookies.indexOf(';') + 1, Cookies.length);

              if(Cookie != '')
                 document.cookie = Cookie + '; expires=' + expires;
              else
                 document.cookie = Cookies + '; expires=' + expires;
              }
         }