// (c) arts access

function adjustHeights() {
  if (document.getElementById('right') && document.getElementById('main') &&  document.getElementById('left')) {
    var left = $('left');
    var main = $('main');
    var right = $('right');
    
    var left_size = left.getSize();
    var main_size = main.getSize();
    var right_size = right.getSize();
    
    var left_height = document.getElementById('left').offsetHeight;
    var main_height = document.getElementById('main').offsetHeight;
    var right_height = document.getElementById('right').offsetHeight;
    
    var layout_height = Math.max(left_height,main_height);
    var layout_height = Math.max(right_height,layout_height);
    var layout_height = Math.max(layout_height,650);
    
    document.getElementById('left').style.height = layout_height + "px";
    document.getElementById('main').style.height = layout_height + "px";
    document.getElementById('right').style.height = layout_height + "px";
  }
}

var pic1_array = new Array('kaiserthron.jpg','schrein.jpg','madonna.jpg','duerer.jpg','statuette.jpg','spiegelsaal.jpg','glaspalast.jpg');
var pic2_array = new Array('schrein.jpg','madonna.jpg','duerer.jpg','statuette.jpg','spiegelsaal.jpg','glaspalast.jpg','kaiserthron.jpg');
var pic3_array = new Array('madonna.jpg','duerer.jpg','statuette.jpg','spiegelsaal.jpg','glaspalast.jpg','kaiserthron.jpg','schrein.jpg');
var pic4_array = new Array('duerer.jpg','statuette.jpg','spiegelsaal.jpg','glaspalast.jpg','kaiserthron.jpg','schrein.jpg','madonna.jpg');

var pic1 = 0;
var pic2 = 0;
var pic3 = 0;
var pic4 = 0;

switchPics();

function switchPics() {
  setPic('toppic1',pic1_array[pic1]);
  setPic('toppic2',pic2_array[pic2]);
  setPic('toppic3',pic3_array[pic3]);
  setPic('toppic4',pic4_array[pic4]);
  
  if (pic1<pic1_array.length-1) {
    pic1++;
  } else {
    pic1 = 0;
  }
  if (pic2<pic2_array.length-1) {
    pic2++;
  } else {
    pic2 = 0;
  }if (pic3<pic3_array.length-1) {
    pic3++;
  } else {
    pic3 = 0;
  }if (pic4<pic4_array.length-1) {
    pic4++;
  } else {
    pic4 = 0;
  }
  
  setTimeout('switchPics()',20000);
}

function setPic(id,pic) {
  if (document.getElementById(id)) {
    document.getElementById(id).src= 'tl_files/artsaccess/topbanner/' + pic;
  }
}