调用ob_end_flush()网页仍旧不能显示有关问题

<?php
@ob_start();

include 'test.tpl.php';

@ob_end_flush();

sleep(3);

//---------------------------------
// invoke client js
$s = sprintf("\n<script>%s.%s();</script>", 'oCar', 'updateDiv1');

// output the buffer to client
echo $s;
unset($s);
@flush();

//----------------------------------
sleep(3);
// invoke client js
$s = sprintf("\n<script>%s.%s();</script>", 'oCar', 'updateDiv2');

// output the buffer to client
echo $s;
unset($s);
@flush();