Unfocus A Window - During Refresh!!

I'm developing an application that involves multi-screen in different
windows. One of my windows involves an automatic refresh every 99 sec.
The problem is that the window is coming into focus each time the
refresh occurs. How can I prevent this from happening?

Implementation of refresh as follows:
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function refreshPage(){
query4 = "<?php echo $_GET['query4']?>";
window.location.href = "fluxOT_frame.php?page_id=0&query4=" + query4 +
"&services=<?php echo $service?>&go_ahead=1&code_er=<?php echo
$cod_er?>&code_appli=<?php echo $code_app?>&periode=<?php echo
$period?>";
}
timeout = <?php echo $period;?> * 1000; // where period = 99
window.setTimeout("refreshPage();",timeout);
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