var agt    = navigator.userAgent.toLowerCase();
var is_mac = (agt.indexOf("mac") != -1);
var is_opera = (agt.indexOf("opera") != -1);
var is_ie  = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_ie7 = (((is_ie) && (agt.indexOf("msie 5")==-1) && (agt.indexOf("msie 6")==-1)));

var instruction;

if(!is_mac) {
instruction = 'Blokering af pop-op-vinduer er slået til\n\nHold Ctrl tast nede, mens du klikker';
}
else {
instruction = 'Blokering af pop-op-vinduer er slået til\n\nHold Æble tast nede, mens du klikker';
}

var siteWindow = null;

function visHjemmeside(x) {
  var winleft = (screen.width - 790) / 2;
  siteWindow = window.open(x,'siteWindow','width=790,height=550,left='+winleft+',top=0,menubar=yes,toolbar=yes,location=yes,status=yes,resizable=yes,scrollbars=yes');
  if(!siteWindow) {
    if(!is_mac) {
    alert('Blokering af pop-op-vinduer er slået til\n\nHold Ctrl tast nede, mens du klikker på link til hjemmeside');
    }
    else {
    alert('Blokering af pop-op-vinduer er slået til\n\nHold Æble tast nede, mens du klikker på link til hjemmeside');
    }
  }
  else {
  if(siteWindow.open) siteWindow.focus();
  }
}

function getCookie(cookieName){
var cookieFoundAt;
var cookieValue;
cookieFoundAt = document.cookie.indexOf(cookieName + "=");
  if (cookieFoundAt < 0) {
  cookieValue = "";
  }
  else {
  cookieFoundAt = document.cookie.indexOf("=",cookieFoundAt);
  cookieFoundAt++;
  cookieEnd = document.cookie.indexOf(";", cookieFoundAt);
    if (cookieEnd == -1) {
    cookieEnd = document.cookie.length;
    }
    cookieValue =document.cookie.substring(cookieFoundAt,cookieEnd);
  }
  return cookieValue;
}

if(getCookie('preload')=='') {
  var imageObj;
  for(var x in lowlights) {
  imageObj = new Image();
  imageObj.src = lowlights[x];
  }
  for(var y in highlights) {
  imageObj = new Image();
  imageObj.src = highlights[y];
  }
  document.cookie = 'preload=1';
}

function init() {
  if((is_ie7)||(is_opera)) {
  var viewportHeight = document.documentElement.offsetHeight || window.innerHeight;
  var reservedHeight = imgHeight + 105;
  var remainedHeight = viewportHeight - reservedHeight;
  document.getElementById("content").style.height = remainedHeight + 'px';
  }
}

function Highlight(number) {
var ident = 'pic' + number;
var image = document.getElementById(ident);
image.src = highlights[number];
}

function Lowlight(number) {
var ident = 'pic' + number;
var image = document.getElementById(ident);
image.src = lowlights[number];
}

if(!is_ie) {
var strCSS = '<style type"text/css">html{overflow:-moz-scrollbars-vertical;}</style>';
document.write(strCSS);
}