var NUM_LINKS_BESIDES_USER_LINKS = 31;
var linksInWaiting = 0;

var getID = getXmlHTTP();
var usersThisPage = ;

function getUpdate(link)
{
	// Get the update.
	linksInWaiting++;
	shiftLeft(link);
	requestUpdate();
}

function requestUpdate()
{
	if(getID.readyState==0)
	{
		
		getID.open("GET", "scripts/getID.php5", true);
		getID.onreadystatechange = updateLink;
		getID.send(null);
	}
}

function updateLink()
{	
	if(getID.readyState==4)
	{
		link = document.getElementById(""+usersThisPage - linksInWaiting);
		result = getID.responseText;
		user = result.split(":");
		id = user[0];
		score = user[1];
		img = user[2];

		if (id != "")
		{
			link.href="scripts/addUser.php5?id="+id;
			
			link.innerHTML ="<img src=\"pics/"+img+"\" class=\"userImage\" />";			
			
			document.getElementById("score"+link.id).innerHTML = score;
		}
		else
		{
			document.getElementById("div"+link.id).innerHTML ="";
			
			// Did we just erase the last user link?
			if (document.links.length == NUM_LINKS_BESIDES_USER_LINKS)
				document.getElementById("userLinks").innerHTML = "<br />\n<i>You've seen everyone there is to see!</i><br /><br />\n<a href=\"scripts/reset.php5\">Show everyone again</a><br /><br />\n<a href=\"scripts/resetUnseen.php5\">Show everyone I haven't clicked</a><br /><br />\n";
		}

		// Get a new XmlHTTP object.
		getID = getXmlHTTP();
		
		// Record that we just updated a link.
		linksInWaiting--;
		
		// Request another update if there are more links to update.
		if (linksInWaiting > 0)
			requestUpdate();
	}
}

function turbo(level)
{
	allLinks = document.links;
	
	for (windowsOpened = 0; windowsOpened < level; windowsOpened++)
	{
		// Just keep refreshing the first link.
		window.open(allLinks[NUM_LINKS_BESIDES_USER_LINKS].href);
		getUpdate(allLinks[NUM_LINKS_BESIDES_USER_LINKS]);
	}	
}

function getXmlHTTP()
{
	var obj;
	
	try
	{
		obj = new XMLHttpRequest();
	}
	catch (e)
	{
		try
		{
			obj = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				obj = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e)
			{
				alert("This website will not work for you because your browser does not support AJAX.\nPlease update your browser (Firefox is recommended) and try again.");
			}
		}
	}
	return obj;
}

function shiftLeft(link)
{
	usersThisPage = document.getElementById("userTable").getElementsByTagName("a").length;
	
	// It's less than and plus one because the ID is an array index
	// and we don't want to shift the last element left, as there'd
	// be nothing to shift it left to.
	while (Number(link.id)+1 < usersThisPage)
	{
		link.innerHTML = document.getElementById(""+(Number(link.id)+1)).innerHTML;
		document.getElementById("score"+link.id).innerHTML = document.getElementById("score"+(Number(link.id)+1)).innerHTML;
		link.href=document.getElementById(""+(Number(link.id)+1)).href;
		link = document.getElementById(""+((Number(link.id)+1)));
	}
}

function getStartPoint()
{
	NUM_LINKS_BESIDES_USER_LINKS = document.links.length - document.getElementById("userTable").getElementsByTagName("a").length - document.getElementById("footer").getElementsByTagName("a").length;
}