function getStyleSheets() {
	if (!document.getElementsByTagName("link")) { return; }
	var links = document.getElementsByTagName("link");
	var count = 0;
	var stylesheetArray = new Array();
	for (var i=0; i<links.length; i++) {
		type = links[i].getAttribute("type");
		if (type=="text/css") {
			stylesheetArray[count] = links[i];
			count++;
			}
	}
	return stylesheetArray;
}

function setStyleSheet(title) {
	var stylesheets = getStyleSheets();
	for (var i=0; i<stylesheets.length; i++) {
		stylesheets[i].disabled = true;
		if (stylesheets[i].getAttribute("title") == title) {
			stylesheets[i].disabled = false;
			stylesheets[0].disabled = false;
			createCookie('style',title,365);
		}
	}

	if (title == "groot") {
		resetFontsize();
		document.getElementById('small').style.color = "#6abc00";
		document.getElementById('small').style.fontWeight = "bold";
		document.getElementById('small').style.textDecoration = "underline";
	} else if (title == "groter") {
		resetFontsize();
		document.getElementById('medium').style.color = "#6abc00";
		document.getElementById('medium').style.fontWeight = "bold";
		document.getElementById('medium').style.textDecoration = "underline";
	} else if (title == "grootst") {
		resetFontsize();
		document.getElementById('large').style.color = "#6abc00";
		document.getElementById('large').style.fontWeight = "bold";
		document.getElementById('large').style.textDecoration = "underline";
	}
}

function getDefaultStyleSheet() {
	var title;
	var stylesheets = getStyleSheets();
	for (var i=0; i<stylesheets.length; i++) {
		if (stylesheets[i].getAttribute("rel").indexOf('alt')== -1) { title = stylesheets[i].getAttribute("title"); }
	}
	return title;	
}
		
function getPreferredStyleSheet() {
	var title;
	if (readCookie('style')) { title=readCookie('style'); } else { title = getDefaultStyleSheet(); }
	return title;
}

/* window.onload = function() {
	var title = getPreferredStyleSheet();
	setStyleSheet(title);
} */

function init() {
	var title = getPreferredStyleSheet();
	if (title == null )
	{
		title = "groot";
	}
	setStyleSheet(title);
	persistantSub();
}

function resetFontsize() {
    document.getElementById("small").style.color = "white";
    document.getElementById("small").style.fontWeight = "normal";
    document.getElementById("small").style.textDecoration = "none";
    document.getElementById("medium").style.color = "white";
    document.getElementById("medium").style.fontWeight = "normal";
    document.getElementById("medium").style.textDecoration = "none";
    document.getElementById("large").style.color = "white";
    document.getElementById("large").style.fontWeight = "normal";
    document.getElementById("large").style.textDecoration = "none";
}

// Cookie scripts

function createCookie(name,value,days)
{
	if (days)
	{
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name)
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++)
	{
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name)
{
	createCookie(name,"",-1);
}