Auto refresh without page load Jquery

<br /><script type="text/javascript"> <br />// AJAX REQUEST <br />function httpRequest(){ <br /> var httpRequest = null; <br /> try { httpRequest = new XMLHttpRequest(); } <br /> catch(e){ <br /> try{httpRequest = new ActiveXObject("Msxml2.XMLHTTP");} <br /> catch(e){httpRequest = new ActiveXObject("Microsoft.XMLHTTP");} <br /> } <br /> return httpRequest; <br />} <br /> <br />var t; <br />function load_data(){ <br /> var http_request = httpRequest(); <br /> var object_area = document.getElementById('object_area'); <br /> var url = "importfeeds.php?osCAdminID=<?php echo $_REQUEST['osCAdminID'];?>"; <br /> http_request.open("GET", url, true); <br /> http_request.onreadystatechange = function(){ <br /> if(http_request.readyState == 4){ <br /> object_area.innerHTML = http_request.responseText; <br /> } <br /> } <br /> http_request.send(null); <br /> t = setTimeout(load_data, 1000); <br />} <br /> <br />document.onLoad = load_data(); <br /> <br /></script> <br /> <br /> <br /> <br /><div id="object_area"> <br />data table for show <br /></div> <br /> <br /> <br /> <br /> <br /> <br />