/* Downloaded from: http://www.unintentionallyblank.co.uk/2006/08/17/the-dom-again-a-style-sheet-switcher/ */

function getStyleSheets(ssType) {
	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");
		rel = links[i].getAttribute("rel");
		
		var browser = navigator.appName;
		if (browser == "Microsoft Internet Explorer") {
			ssClass = links[i].getAttribute("className");
		} else {
			ssClass = links[i].getAttribute("class");
		}
		
		if ((type == "text/css") && (rel == "alternate stylesheet") && (ssClass == "style" + ssType)) {
			stylesheetArray[count] = links[i];
			count++;
		}
	}
	return stylesheetArray;
}

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

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(ssType) {
	var title;
	if (readCookie('mrc' + ssType + 'Style')) {
		title = readCookie('mrc' + ssType + 'Style');
	} else {
		title = getDefaultStyleSheet();
	}
	return title;
}

window.onload = function() {
	var ssSize = 'size';
	var titleSize = getPreferredStyleSheet(ssSize);
	setStyleSheet(titleSize, ssSize);
	
	var ssClarity = 'clarity';
	var titleClarity = getPreferredStyleSheet(ssClarity);
	setStyleSheet(titleClarity, ssClarity);
}

// 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);
}