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

function deleteCookie(name)
{
	cookieSet(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 "rnd" 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)
		cookieSet("mysheet", styletitle, days)
	}
}

var selectedtitle=cookieGet("mysheet")
if (document.getElementById && selectedtitle!=null) //load user chosen style sheet from cookie if there is one stored
setStylesheet(selectedtitle)