$(function(){
  var mdelay=5000;
  window.topslider={images:$('#slider img'),current:0};
  if(window.topslider.images.length>1) setInterval(topsliderAnim,mdelay);
  showTopLogo(0);
});

function hideLogo() {
  $(this).hide();
}

function hideTopLogo(item) {
  var sitem=$(window.topslider.images[item]);
  sitem.animate({opacity: 0},200, hideLogo);
}
function showTopLogo(item) {
  var sitem=$(window.topslider.images[item]);
  sitem.show();
  sitem.css({opacity: 0});
  sitem.animate({opacity: 1.0},200);
}

function topsliderAnim() {
  var i;
  var cc=window.topslider.current;
  hideTopLogo(cc);
  cc=(cc+1)%window.topslider.images.length;
  showTopLogo(cc);
  window.topslider.current=cc;
}