<html>
<head><title>Loading JS</title>
</head>
<body>
<form>
<input type="text" id="cnt" />
</form>
<?php
for ($i=0; $i<10; $i++){
echo '<script type="text/javascript">document.getElementById("cnt").value = ', $i, ';</script>';
echo "\n";
flush();
sleep(1);
}
?>
</body>
</html>