//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) {
		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
	}
}