Auto refresh without page load Jquery

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 />