var delay = 3000;
var random_pics = new Array();
var random_pics_count = 0;

function preloadImgs() {
  for (var i = 0; i < 7; i++) 
    random_pics[i] = "images/random_pics/" + i + ".jpg";
  MM_preloadImages(random_pics);
}

function rotateRandomPics() {
  if (random_pics_count == (random_pics.length)) random_pics_count = 0;
  MM_swapImage('random_pic', '', random_pics[random_pics_count++]);
  setTimeout('rotateRandomPics()', delay);
}

function MM_preloadImages() { //v3.0
  var d = document; 
  if (d.images) { 
    if (!d.MM_p) d.MM_p = new Array();
    var i;
    var j = d.MM_p.length;
    var a = MM_preloadImages.arguments; 
    for (i = 0; i < a.length; i++)
      if (a[i].indexOf("#") != 0) { 
        d.MM_p[j] = new Image; 
        d.MM_p[j++].src = a[i];
      }
   }
}

function MM_swapImgRestore() { //v3.0
  var i, x;
  var a = document.MM_sr; 
  for (i = 0; a && i < a.length && (x = a[i]) && x.oSrc; i++) 
    x.src = x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p, i, x;  
  if (!d) 
    d = document; 
  if ((p = n.indexOf("?")) > 0 && parent.frames.length) {
    d = parent.frames[n.substring(p + 1)].document; 
    n = n.substring(0, p);
  }
  if (!(x = d[n]) && d.all) 
    x = d.all[n]; 
  for (i = 0; !x && i < d.forms.length; i++) 
    x = d.forms[i][n];
  for(i = 0; !x && d.layers && i < d.layers.length; i++) 
    x = MM_findObj(n, d.layers[i].document);
  if (!x && d.getElementById) 
    x = d.getElementById(n); 
  return x;
}

function MM_swapImage() { //v3.0
  var i, j = 0, xr;
  var a = MM_swapImage.arguments; 
  document.MM_sr = new Array; 
  for(i = 0; i < (a.length - 2); i += 3)
    if ((x = MM_findObj(a[i])) != null) { 
      document.MM_sr[j++] = x; 
      if(!x.oSrc) 
        x.oSrc = x.src; 
        x.src = a[i+2];
      }
}