function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}

var http = createRequestObject();

function postComment(vid_id, text) {
    http.open('get', '/ajax/postComment.php?vid_id='+vid_id+'&text='+text);
    http.onreadystatechange = handlePostCommentResponse;
    http.send(null);
}
		 
function handlePostCommentResponse() {
  if(http.readyState == 4) {
    var response = http.responseText;
    document.getElementById('ajaxGen').innerHTML = response;
  }
}