location.href="paginadestino.php"
header("Location: paginadestino.php");
<script type="text/javascript">
function sleep(milliseconds) {
var start = new Date().getTime();
for (var i = 0; i < 1e7; i++) {
if ((new Date().getTime() - start) > milliseconds){
break;
}
}
}
</script>
<script>
sleep(10000);
location.href="main.html";
</script>