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

// alert(navigator.appName);

var request_http = createRequestObject();
var submit_http = createRequestObject();
var pic_id; // = document.getElementById("comment_id").value;
var comment_shown = false;
var comment_text = "";
var after_submit = "false";

function flip_comment(id) {
	if (comment_shown) {
		comment_shown = document.getElementById('comments').innerHTML;
		document.getElementById('comments').innerHTML = "";
		comment_shown = false;
		document.getElementById('status').innerHTML = "";
	} else {
		if (comment_text == "") {
			sndReq(id);
		} else {
			document.getElementById('comments').innerHTML = comment_text;
		}
		comment_shown = true;
	}
}

function sndReq(action) {
    request_http.onreadystatechange = handleResponse;
    request_http.open('get', 'comment_ajax.php?id=' + action);
    request_http.send(null);
}

function handleResponse() {
    if(request_http.readyState == 4){
        var response = request_http.responseText;
        document.getElementById('comments').innerHTML = response;

	if (after_submit == "true") {
		location.replace("#top_of_comment");
		after_submit = "false";
	}

	location.replace("#top_of_comment");
    }
}

function handleSubmit() {
    if(submit_http.readyState == 4){

	document.getElementById('comment_box').innerHTML = "";

	var response = submit_http.responseText;
	var finished;
	if (response == "Done") {
		finished = "<span class=\"caption2\">Succesfully posted</span>";
	} else {
		finished = response;
	}
	document.getElementById('status').innerHTML = finished;
	sndReq(pic_id);

	after_submit = "true";
    }
}

function submitForm() {

  var alert_text = "";
  if (document.getElementById("comment_name").value == "") {

    alert_text += "\nPlease enter a name";

  }

  if (document.getElementById("comment_body").value == "") {

    alert_text += "\nPlease enter some text";

  }

  if (alert_text != "") {

    alert(alert_text);
    return;
  }
    
  submit_http.onreadystatechange = handleSubmit;

  var postString = "comments.php?comment_url=" + escape(document.getElementById("comment_url").value) + "&comment_name=" + escape(document.getElementById("comment_name").value) + "&comment_body=" + escape(document.getElementById("comment_body").value) + "&comment_id=" + escape(document.getElementById("comment_id").value);

  submit_http.open("get", postString);
  submit_http.send(null);
  pic_id = document.getElementById("comment_id").value;
  var submitting = "Submitting " + document.getElementById("comment_body").value;
  document.getElementById('comment_box').innerHTML = submitting;
}