var httpObject = null, headers = [], progressBar = null, pbT = null, pbTimeout = 500, ajaxT = null, ajaxTimeout = 10000;
function fixProgressBar()
{
	if (progressBar == null)
		return;
	setTopLeft(progressBar, document.body.scrollTop, 0);
}
function setTopLeft(obj, top, left)
{
	if (document.getElementById && !document.all)
	{
		obj.style.top = top;
		obj.style.left = left;
	}
	else
	{
		obj.style.pixelTop = top;
		obj.style.pixelLeft = left;
	}
}
function changeDisplay(i, next)
{
	var htm = "Loading";
	switch (i)
	{
		case 1:
			htm += "...  ";
			break;
		case 2:
			htm += " ... ";
			break;
		case 3:
			htm += "  ...";
	}
	progressBar.innerHTML = htm;
	if (next)
	{
		var nextI = i < 3 ? (i + 1) : 1;
		pbT = setTimeout("changeDisplay(" + nextI + ", " + next + ");", pbTimeout);
	}
}
function getVarObject(name, value)
{
	var obj = new Object();
	obj.name = name;
	obj.value = encodeURIComponent(value);
	obj.toString = new Function("return printVarObject(this);");
	return obj;
}
function addVarObject(vars, name, value)
{
	var obj = getVarObject(name, value);
	return addObjToVarObject(vars, obj);
}
function addObjToVarObject(vars, obj)
{
	vars[vars.length] = obj;
	return vars;
}
function printVarObject(obj)
{
	return obj.name + "," + obj.value;
}
function getHTTPObject()
{
	if (window.ActiveXObject)
		return new ActiveXObject("Microsoft.XMLHTTP");
	else if (window.XMLHttpRequest)
		return new XMLHttpRequest();
	else
		return null;
}
function setOutput(pg)
{
	if (httpObject.readyState == 4 && httpObject.status == 200)
	{
		if (typeof(pg) != "undefined")
		{
			curPage = pg;
			document.getElementById("").getElementsByTagName("h1")[0].innerHTML = headers[curPage - 1];
		}
		document.getElementById("curPageTxt").innerHTML = httpObject.responseText;
		clearProgressBar(false);
		httpObject.onreadystatechange = new Function("");
	}
}
function clearProgressBar(timeout)
{
	if (timeout)
		alert("AJAX has timed out.  Please try again.");
	progressBar.style.display = "none";
	clearTimeout(pbT);
	setTopLeft(progressBar, 0, 0);
	changeDisplay(1);
	clearTimeout(ajaxT);
}
function doAJAXPostBack(href)
{
	httpObject = getHTTPObject();
	if (httpObject != null)
	{
		href = href.substr(href.lastIndexOf("/") + 1);
		var pgStr = "?pg=";
		var pg = 1;
		if (href.indexOf(pgStr) >= 0)
			pg = href.substring(href.indexOf(pgStr) + pgStr.length, href.length);
		else if (href.indexOf("page") >= 0)
			pg = href.substring(4, href.indexOf("."));
		postVars = getPostVars();
		clearTimeout(ajaxT);
		clearTimeout(pbT);
		progressBar = document.getElementById("progressBar");
		fixProgressBar();
		window.onscroll = fixProgressBar;
		progressBar.style.display = "inline-block";
		pbT = setTimeout("changeDisplay(2, true);", pbTimeout);
		httpObject.open("POST", "ajax.php" + (typeof(loggedIn) != "undefined" || pg > 1 ? "?" : "") + (pg > 1 ? "pg=" + pg + (typeof(loggedIn) != "undefined" ? "&" : "") : "") + (typeof(loggedIn) != "undefined" ? "loggedIn=true" : ""), true);
		httpObject.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
		httpObject.setRequestHeader("Content-length", postVars.length);
		httpObject.setRequestHeader("Connection", "close");
		httpObject.send(postVars.join("&").replace(new RegExp(',', 'g'), "="));
		httpObject.onreadystatechange = new Function("setOutput(" + (typeof(loggedIn) != "undefined" ? + pg : "") + ");");
		ajaxT = setTimeout("clearProgressBar(true);", ajaxTimeout);
		return false;
	}
	else
		return true;
}
function getPostVars()
{
	if (!document.forms[0]) return [];
	var frm = document.forms[0];
	var post = [], j = -1;
	for (i = 0; i < frm.elements.length; i++)
		if (frm.elements[i].name != "" && frm.elements[i].type != "submit" && frm.elements[i].type != "radio" && frm.elements[i].name != "htm")
		{
			j++;
			if (frm.elements[i].type == "textarea")
				post = addVarObject(post, frm.elements[i].name, document.all ? frm.elements[i].innerText : frm.elements[i].value);
			else if (frm.elements[i].type == "checkbox")
				post = addVarObject(post, frm.elements[i].name, frm.elements[i].checked ? 'on' : '');
			else
				post = addVarObject(post, frm.elements[i].name, frm.elements[i].value);
		}
	return post;
}