<script type="text/javascript">
var timer;
function refreshIframe(){
if(timer)
clearInterval(timer)
timer = setTimeout(refreshIframe,5000)
var iframe = document.getElementById('iframe');
iframe.src="http://google.com";
}
refreshIframe();
</script>
<iframe id="iframe" src="http://google.com" width="100%" height="300">
<p>Your browser does not support iframes.</p>
</iframe>
solved how to refresh an iframe in php page [duplicate]