//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 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
} 
}




function chooseFont(styletitle){ //Interface function to switch style sheets plus save "title" attr of selected stylesheet to cookie

	if (document.getElementById)
	{
		var type = document.getElementById('colour').value;
		var size = document.getElementById('size').value;
		
		if(type=='default' || type=='undefined')
		{
			//Basic colour - set the font based on what is passed and leave the colour as found
			setStylesheet(styletitle);
			document.getElementById('size').value=styletitle;
			
			setStyleCookies(styletitle, styletitle, type);
		}
		else
		{
			//Other colour
			document.getElementById('size').value=styletitle;
				
			if(styletitle=='default')
			{
				setStylesheet(type);

				setStyleCookies(type, size, type);
			}
			else
			{
				setStylesheet(type + '-' + styletitle);
				
				setStyleCookies(type + '-' + styletitle, size, type);				
			}
		}
	}
}


function chooseColour(colour){ //Interface function to switch style sheets plus save "title" attr of selected stylesheet to cookie
	
	switch(colour)
	{
		case 'default':
		case 'green':
		case 'blue':
		case 'yellow':
			break;
		default:
			return;
			break;
	}

	if (document.getElementById)
	{
		var size = document.getElementById('size').value;
		
		document.getElementById('colour').value=colour;
		
		//this controls the colour red border hightlight
		document.getElementById("select-default").className = "colorblock1";
		document.getElementById("select-green").className = "colorblock2";
		document.getElementById("select-blue").className = "colorblock3";
		document.getElementById("select-yellow").className = "colorblock4";
		
		document.getElementById("select-" + colour).className = "colorblock-"  + colour;
		
		if (colour=='default')
		{
			setStylesheet(size);
				
			setStyleCookies(size, size, colour);
		}
		else
		{
			if(size=='default' || size=='undefined')
			{
				setStylesheet(colour);
				
				setStyleCookies(colour, size, colour);
			}
			else
			{
				setStylesheet(colour + '-' + size);
				document.getElementById('size').value=size;
				
				setStyleCookies(colour + '-' + size, size, colour);
			}
		}
	}
}

function setColourHighLight()
{
	var colour = document.getElementById('colour').value;
	document.getElementById("select-" + colour).className = "colorblock-"  + colour;
}


function setStyleCookies(mysheet, size, type)
{
	setCookie("mysheet", mysheet, 60);
	setCookie("size", size, 60);
	setCookie("colour", type, 60);
}