var operan800 = false;

if (navigator.appName == "Microsoft Internet Explorer" && window.innerHeight < 500) {   //n800 opera
  operan800 = true;
  document.write ("<link rel='stylesheet' type='text/css' href='maemobrowser_operan800.css' />"); 
}
else if (window.innerHeight < 500) {   // n800 maemo
  document.write ("<link rel='stylesheet' type='text/css' href='maemobrowser.css' />");
}
else {   //desktop
  document.write ("<link rel='stylesheet' type='text/css' href='maemobrowser_bigger.css' />");
}




var currentSection = "1st-pane";
var scroll = {  timeScrolled:0,
    startPosition:0,
    amount:0.0,
    duration:0.0,
    element:null,
    timer:null};


function scrollTo(destination) {

  if (currentSection == destination) {
    return;
  }

  var offset = "1st-pane";

  var position = getElementY(document.getElementById(destination));
  var offsetPos = getElementY(document.getElementById(offset));
  position = position - offsetPos;
  
  var scroller = document.getElementById("dynscr_scroller");
  
  scroll.timeScrolled = 0;
  scroll.startPosition = scroller.scrollTop;
  scroll.amount = position - scroller.scrollTop;
  scroll.duration = 25;
  scroll.element = scroller;

  scroll.timer = setInterval("scrollABit();", 7);

  var lastSection = currentSection;
  currentSection = destination;

  document.getElementById(currentSection.split("-")[0]+"-tab").className = "active";
  if (lastSection) {
    document.getElementById(lastSection.split("-")[0]+"-tab").className = "inactive";
  }  
  
}

function scrollABit() {
  if (scroll.timeScrolled > scroll.duration) {
    clearInterval(scroll.timer);
    scroll.timer = null;
  }
  else {
    scroll.element.scrollTop = ease(scroll.timeScrolled, scroll.startPosition, scroll.amount, scroll.duration);
    scroll.timeScrolled++;
  }
}

function ease(time, start, change , duration) {
  return -change/2 * (Math.cos(Math.PI*time/duration) - 1) + start;
}

function getElementY(element){
  var y = 0;
  do {
    y += element.offsetTop;
  } while ( element = element.offsetParent )
  return y;
}