// StyleSwitcher functions written by Paul Sowden
// http://www.alistapart.com/stories/alternate/
function setActiveSS(title) { 
	var i, a, main; 
	for (i=0; (a = document.getElementsByTagName("link")[i]); i++) { 
		if (a.getAttribute("rel") && a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) { 
		a.disabled = true; 
		if(a.getAttribute("title") == title) a.disabled = false; 
		} 
	}
}

function getActiveSS() { 
	var i, a; 
	for (i=0; (a = document.getElementsByTagName("link")[i]); i++) { 
		if (a.getAttribute("rel") && a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled ) return a.getAttribute("title"); 
		} 
	return null; 
}

function getPreferredSS() { 
	var i, a; 
	for (i=0; (a = document.getElementsByTagName("link")[i]); i++) { 
		if (a.getAttribute("rel") && a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("rel").indexOf("alt") == -1 && a.getAttribute("title") ) return a.getAttribute("title"); 
		} 
	return null; 
}

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 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;
}

window.onload = function(e) { 
	var cookie = readCookie("style"); 
	var title = cookie ? cookie : getPreferredSS(); setActiveSS(title);
}

window.onunload = function(e) { 
	var title = getActiveSS(); 
	createCookie("style", title, 365); 
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredSS();
setActiveSS(title);