/* Onload */
window.onload = initCSS;

// initCSS: If there's a "mystyle" cookie, set the active stylesheet when the page loads
function initCSS()
{
	var style = readCookie("mystyle");
	if (style)
	{
		activeCSS(style);
	}
}

/* Switcher functions */
// activeCSS: Set the active stylesheet
function activeCSS(title)
{
	var i, oneLink;
	for (i = 0; (oneLink = document.getElementsByTagName("link")[i]); i++)
	{
		if (oneLink.getAttribute("title") && findWord("stylesheet", oneLink.getAttribute("rel")))
		{
			oneLink.disabled = true;
			if (oneLink.getAttribute("title") == title)
			{
				oneLink.disabled = false;
			}
		}
	}
	setCookie("mystyle", title, 365);
}

// findWord: Used to find a full word (needle) in a string (haystack)
function findWord(needle, haystack)
{
	var init = needle + "\\b";
	return haystack.match(needle + "\\b");
}

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

// Read the cookie
function readCookie(name)
{
	var needle = name + "=";
	var cookieArray = document.cookie.split(';');
	for (var i=0; i < cookieArray.length; i++)
	{
		var pair = cookieArray[i];
		while (pair.charAt(0)== ' ')
		{
			pair = pair.substring(1, pair.length);
		}
		if (pair.indexOf(needle) == 0)
		{
			return pair.substring(needle.length, pair.length);
		}
	}
	return null;
}