Simple AJAX reload every 1 second script

<BODY onLoad="init()">

<script type=text/javascript>
function ajaxRequest(){
 var activexmodes=["Msxml2.XMLHTTP", "Microsoft.XMLHTTP"] //activeX versions to check for in IE
 if (window.ActiveXObject){ //Test for support for ActiveXObject in IE first (as XMLHttpRequest in IE7 is broken)
  for (var i=0; i<activexmodes.length; i++){
   try{
    return new ActiveXObject(activexmodes[i])
   }
   catch(e){
    //suppress error
   }
  }
 }
 else if (window.XMLHttpRequest) // if Mozilla, Safari etc
  return new XMLHttpRequest()
 else
  return false
}
function getpost()
{
var mygetrequest=new ajaxRequest()
mygetrequest.onreadystatechange=function(){
 if (mygetrequest.readyState==4){
  if (mygetrequest.status==200 || window.location.href.indexOf("http")==-1){
   document.getElementById("result").innerHTML=mygetrequest.responseText
  }
  else{

  }
 }
}
mygetrequest.open("GET", "http://example.com", true)
mygetrequest.send(null)

}
function init()
{
getpost();
setTimeout("init()", 1000);
}
</script>
<div id=result></div>