var imgs = new Array(); var imgcnt = 0; var thisimg = 0;
imgs[imgcnt++] = 'pic7a.gif';
imgs[imgcnt++] = 'pic6a.gif';
imgs[imgcnt++] = 'pic2a.gif';
imgs[imgcnt++] = 'pic3a.gif';
imgs[imgcnt++] = 'pic4a.gif';
imgs[imgcnt++] = 'pic5a.gif';
imgs[imgcnt++] = 'pic1a.gif'; 

function rotate() {
if (document.images) {
  thisimg++;
  if (thisimg >= imgcnt) thisimg = 0;
  document.rollimg.src = imgs[thisimg];
  setTimeout("rotate();",4000);
}
}
setTimeout("rotate();",4000);