function MM_findObj(n, d) { 
  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 swapBackground() { 
  var i,j=0,x,a=swapBackground.arguments;
  for(i=0;i<(a.length-2);i+=3)
    if ((x=MM_findObj(a[i]))!=null){ x.style.backgroundImage = 'url(' + a[i+2] + ')';  }
}

var counter = 0;
function rotateImages() {
  setTimeout('rotateImages()', 5000);
  if (counter != 0) {
    swapBackground('photo', '', imgs[counter % imgs.length]);
  }
  counter++;
}