/* Modified form of original at http://www.alistapart.com/articles/alternate/ */
// Ident: $Id: styleSwitcher.js 48156 2009-02-25 18:54:43Z rabrahamson $

function setActiveStyleSheet(title) {
	try {
		var i, a, main;
		for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
			if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
				a.disabled = true;
				if(a.getAttribute("title") == title) a.disabled = false;
			}
		}
	} catch(e) {
	}
}

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

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

function createCookie(name,value,days) {
	try {
		if (days) {
			var date = new Date();
			date.setTime(date.getTime()+(days*24*60*60*1000));
			var expires = "; expires="+date.toGMTString();
		}
		else expires = "";
		
		var host_name = location.hostname;
		var cookie_domain = host_name;
		var host_port = location.port;
		var re = new RegExp("^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+");
		if (!host_name.match(re)) {
		//Strip first part of host
		var cookie_domain = host_name.substr(host_name.indexOf("."), host_name.length);
		}
	
		document.cookie = name+"="+value+expires+"; path=/;domain="+cookie_domain;
	} catch(e) {
	}
}

function readCookie(name) {
	try {
		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;
	} catch(e) {
	}
}

window.onload = function(e) {
	var cookie = readCookie("WAMNET_STYLE2");
	var title = cookie ? unescape(cookie) : getPreferredStyleSheet();
	setActiveStyleSheet(title);
}

window.onunload = function(e) {
	var title = getActiveStyleSheet();
	createCookie("WAMNET_STYLE2", escape(title), 365);
}

var cookie = readCookie("WAMNET_STYLE2");
var title = cookie ? unescape(cookie) : getPreferredStyleSheet();
setActiveStyleSheet(title);