var outgif = {};
var overgif = {};
var destination = {};
outgif.conf = 'images/knapper/conf1.gif';
overgif.conf = 'images/knapper/conf2.gif';
outgif.themes = 'images/knapper/themes1.gif';
overgif.themes = 'images/knapper/themes2.gif';
outgif.speak = 'images/knapper/speak1.gif';
overgif.speak = 'images/knapper/speak2.gif';
outgif.program = 'images/knapper/schedule1.gif';
overgif.program = 'images/knapper/schedule2.gif';
outgif.tutorials = 'images/knapper/tutorials1.gif';
overgif.tutorials = 'images/knapper/tutorials2.gif';
outgif.event = 'images/knapper/event1.gif';
overgif.event = 'images/knapper/event2.gif';
outgif.registra = 'images/knapper/registra1.gif';
overgif.registra = 'images/knapper/registra2.gif';
outgif.travel = 'images/knapper1/travel1.gif';
overgif.travel = 'images/knapper1/travel2.gif';
outgif.hotel = 'images/knapper1/hotel1.gif';
overgif.hotel = 'images/knapper1/hotel2.gif';
outgif.aarhus = 'images/knapper1/aarhus1.gif';
overgif.aarhus = 'images/knapper1/aarhus2.gif';
outgif.organiz = 'images/knapper/organiz1.gif';
overgif.organiz = 'images/knapper/organiz2.gif';
outgif.exhib = 'images/knapper/exhib1.gif';
overgif.exhib = 'images/knapper/exhib2.gif';
outgif.part = 'images/knapper/participants1.gif';
overgif.part = 'images/knapper/participants2.gif';
outgif.spons = 'images/knapper/spons1.gif';
overgif.spons = 'images/knapper/spons2.gif';
outgif.home = 'images/knapper/home1.gif';
overgif.home = 'images/knapper/home2.gif';
var menu =
["conf","themes","speak","program","tutorials","event","registra","organiz","exhib","spons","part","home"];

function init() {
  var i;
  for (i=0; i<menu.length; i++) {
    document["pic"+(i+1)].src=outgif[menu[i]];
    destination[menu[i]]=document.links[i].href;
  }
}

function over(i) {
  if (i<=menu.length) {
    document["pic"+i].src=overgif[menu[i-1]];
  }
}

function out(i) {
  if (i<=menu.length) {
    document["pic"+i].src=outgif[menu[i-1]];
  }
}

function jump(i) {
  if (i<=menu.length)
    document.location=destination[menu[i-1]];
}