Problem with IE and setInterval() not refreshing/updating
Try disabling the cache with ajaxSetup
$.ajaxSetup ({ // Disable caching of AJAX responses */ cache: false});function updateComm() { var url="commandSys.php"; jQuery("#theElement").load(url); }setInterval(updateComm, 1000);Alternatively, you can manually just append a +new Date to url so it appends a query string to prevent caching.
Alternatively, disable caching on the server-side.
Your php page is cached. Has nothing to do with the interval. Set the right caching headers on the page.