Metti da qualche parte nella pagina:

<form name="telec" action="http://***.***.***.***:****/nphControlCamera?Direction=PanScan&Resolution=320x 240&Quality=Standard&RPeriod=0&Size=STD&PresetOper ation=Move&Language=1"
TARGET="blank">
</form>
<script>setInterval('document.telec.submit()',3000 0);</script>

ciao