<script type="text/javascript">
  function sayac(id,artis){
  var element = document.getElementById(id);
  var cur = element.innerHTML;
  cur = (cur*1)+artis;
  element.innerHTML = cur;
}
</script>

<?php
function yukle($id,$sayi,$art,$hiz){
  echo '<script type="text/javascript">
  window.setInterval("sayac(\''.$id.'\','.$art.')", '.$hiz.');
  </script>
  <span id="'.$id.'">'.$sayi.'</span><br />';
}

yukle("deneme1",50,50,1000); //yazılacak id, ilk sayı, artış, artış hızı
yukle("deneme2",15,9,2000);
yukle("deneme3",100,100,1000);

?>