var manual_or_random="manual";
var randomsetting="3 days"; 

function getCookie(Name) 
{ 
	var re=new RegExp(Name+"=[^;]+", "i");
	if (document.cookie.match(re)) 
	{
		return document.cookie.match(re)[0].split("=")[1];
	}
	return null;
};

function setCookie(name, value, days) 
{
	var expireDate = new Date();
	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)
{ 
	var i, cacheobj, altsheets=[""];
	for(i=0; (cacheobj=document.getElementsByTagName("link")[i]); i++) 
	{
		if(cacheobj.getAttribute("rel").toLowerCase()=="alternate stylesheet" && cacheobj.getAttribute("title")) 
		{ 
			cacheobj.disabled = true;
			altsheets.push(cacheobj);
			if(cacheobj.getAttribute("title") == title)
			{
				cacheobj.disabled = false;
			}
		}
	}
	if (typeof randomize!="undefined")
	{
		var randomnumber=Math.floor(Math.random()*altsheets.length);
		altsheets[randomnumber].disabled=false;
	}
	return (typeof randomize!="undefined" && altsheets[randomnumber]!="")? altsheets[randomnumber].getAttribute("title") : "" ;
};

function chooseStyle(styletitle, days)
{
	if (document.getElementById)
	{
		setStylesheet(styletitle);
		setCookie("mysheet", styletitle, days);
	}
};

function indicateSelected(element)
{
	if (selectedtitle!=null && (element.type==undefined || element.type=="select-one"))
	{
		var element=(element.type=="select-one") ? element.options : element;
		for (var i=0; i<element.length; i++)
		{
			if (element[i].value==selectedtitle)
			{
				if (element[i].tagName=="OPTION")
				{
					element[i].selected=true;
				} else 
				{
					element[i].checked=true;
				}
				break;
			}
		}
	}
};

if (manual_or_random=="manual")
{ 
	var selectedtitle=getCookie("mysheet");
	if (document.getElementById && selectedtitle!=null)
	{
		setStylesheet(selectedtitle);
	}
} else if (manual_or_random=="random")
{
	if (randomsetting=="eachtime")
	{
		setStylesheet("", "random");
	} else if (randomsetting=="sessiononly")
	{ 
		if (getCookie("mysheet_s")==null)
		{
			document.cookie="mysheet_s="+setStylesheet("", "random")+"; path=/";
		} else
		{
			setStylesheet(getCookie("mysheet_s"));
		}
	} else if (randomsetting.search(/^[1-9]+ days/i)!=-1)
	{ 
		if (getCookie("mysheet_r")==null || parseInt(getCookie("mysheet_r_days"))!=parseInt(randomsetting))
		{ 
			setCookie("mysheet_r", setStylesheet("", "random"), parseInt(randomsetting)); 
			setCookie("mysheet_r_days", randomsetting, parseInt(randomsetting));
		}
	} else 
	{
		setStylesheet(getCookie("mysheet_r"));
	}
}