//Style Sheet Switcher version 1.1 Oct 10th, 2006
//Author: Dynamic Drive: http://www.dynamicdrive.com
//Usage terms: http://www.dynamicdrive.com/notice.htm

var manual_or_random = "manual" //"manual" or "random"
var randomsetting = "3 days" //"eachtime", "sessiononly", or "x days (replace x with desired integer)". Only applicable if mode is random.

//////No need to edit beyond here//////////////

function getCookie(Name) {
	var re = new RegExp(Name + "=[^;]+", "i"); //construct RE to search for target name/value pair
	if (document.cookie.match(re)) //if cookie found
		return document.cookie.match(re)[0].split("=")[1] //return its value
	return null
}

function setCookie(name, value, days) {
	var expireDate = new Date()
	//set "expstring" to either future or past date, to set or delete cookie, respectively
	var expstring = (typeof days != "undefined") ? expireDate.setDate(expireDate.getDate() + parseInt(days)) : expireDate.setDate(expireDate.getDate() - 5)
	document.cookie = name + "=" + value + "; expires=" + expireDate.toGMTString() + "; path=/";
}

function deleteCookie(name) {
	setCookie(name, "moot")
}


function setStylesheet(title, randomize) { //Main stylesheet switcher function. Second parameter if defined causes a random alternate stylesheet (including none) to be enabled
	var i, cacheobj, altsheets = [""]
	for (i = 0; (cacheobj = document.getElementsByTagName("link")[i]); i++) {
		if (cacheobj.getAttribute("rel").toLowerCase() == "alternate stylesheet" && cacheobj.getAttribute("title")) { //if this is an alternate stylesheet with title
			cacheobj.disabled = true
			altsheets.push(cacheobj) //store reference to alt stylesheets inside array
			if (cacheobj.getAttribute("title") == title) //enable alternate stylesheet with title that matches parameter
				cacheobj.disabled = false //enable chosen style sheet
		}
	}
	if (typeof randomize != "undefined") { //if second paramter is defined, randomly enable an alt style sheet (includes non)
		var randomnumber = Math.floor(Math.random() * altsheets.length)
		altsheets[randomnumber].disabled = false
	}
	return (typeof randomize != "undefined" && altsheets[randomnumber] != "") ? altsheets[randomnumber].getAttribute("title") : "" //if in "random" mode, return "title" of randomly enabled alt stylesheet
}

function chooseStyle(styletitle, days) { //Interface function to switch style sheets plus save "title" attr of selected stylesheet to cookie
	if (document.getElementById) {
		setStyleAnchor(styletitle)
		setStylesheet(styletitle)
		setCookie("mysheet", styletitle, days)
	}
}

function indicateSelected(element) { //Optional function that shows which style sheet is currently selected within group of radio buttons or select menu
	if (selectedtitle != null && (element.type == undefined || element.type == "select-one")) { //if element is a radio button or select menu
		var element = (element.type == "select-one") ? element.options : element
		for (var i = 0; i < element.length; i++) {
			if (element[i].value == selectedtitle) { //if match found between form element value and cookie value
				if (element[i].tagName == "OPTION") //if this is a select menu
					element[i].selected = true
				else //else if it's a radio button
					element[i].checked = true
				break
			}
		}
	}
}

if (manual_or_random == "manual") { //IF MANUAL MODE
	var selectedtitle = getCookie("mysheet")
	if (document.getElementById && selectedtitle != null) //load user chosen style sheet from cookie if there is one stored
		setStylesheet(selectedtitle)
}
else if (manual_or_random == "random") { //IF AUTO RANDOM MODE
	if (randomsetting == "eachtime")
		setStylesheet("", "random")
	else if (randomsetting == "sessiononly") { //if "sessiononly" setting
		if (getCookie("mysheet_s") == null) //if "mysheet_s" session cookie is empty
			document.cookie = "mysheet_s=" + setStylesheet("", "random") + "; path=/" //activate random alt stylesheet while remembering its "title" value
		else
			setStylesheet(getCookie("mysheet_s")) //just activate random alt stylesheet stored in cookie
	}
	else if (randomsetting.search(/^[1-9]+ days/i) != -1) { //if "x days" setting
		if (getCookie("mysheet_r") == null || parseInt(getCookie("mysheet_r_days")) != parseInt(randomsetting)) { //if "mysheet_r" cookie is empty or admin has changed number of days to persist in "x days" variable
			setCookie("mysheet_r", setStylesheet("", "random"), parseInt(randomsetting)) //activate random alt stylesheet while remembering its "title" value
			setCookie("mysheet_r_days", randomsetting, parseInt(randomsetting)) //Also remember the number of days to persist per the "x days" variable
		}
		else
			setStylesheet(getCookie("mysheet_r")) //just activate random alt stylesheet stored in cookie
	}
}

//Webbeat
function setStyleAnchor(styletitle) {
	if (selectedtitle != null) {
		document.getElementById(selectedtitle).className = null;
	}
	document.getElementById(styletitle).className = 'selected';
	selectedtitle = styletitle;
}

$(document).ready(function () {
	if (!document.getElementById(selectedtitle))
		selectedtitle = 'normalfont';
	document.getElementById(selectedtitle).className = 'selected';
});