function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

//function styleChange(id) {
//	document.getElementById('small').rel='alternate stylesheet';
//	document.getElementById('medium').rel='alternate stylesheet';
//	document.getElementById('large').rel='alternate stylesheet';
//	document.getElementById('x-large').rel='alternate stylesheet';
//	document.getElementById(id).rel='stylesheet';
//	}


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 defaultFontSize() {
	var fs = readCookie("FontSize");
	switch(fs) {
		case "small":
			fs = "small";
			break;
		case "medium":
			fs = "medium";
			break;
		case "large":
			fs = "large";
			break;
		case "x-large":
			fs = "x-large";
			break;
		default:
			fs = "medium";
	}
	createCookie("FontSize", fs, 365);
	setStylesheet(fs);
}



function reduceFontSize() {
	var fs = readCookie("FontSize");
	switch(fs) {
		case "small":
			// do nothing
			break;
		case "medium":
			fs = "small";
			break;
		case "large":
			fs = "medium";
			break;
		case "x-large":
			fs = "large";
			break;
		default:
			fs = "small";
	}
	createCookie("FontSize", fs, 365);
	setStylesheet(fs);
}

function increaseFontSize() {
	var fs = readCookie("FontSize");
	switch(fs) {
		case "small":
			fs = "medium";
			break;
		case "medium":
			fs = "large";
			break;
		case "large":
			fs = "x-large";
			break;
		case "x-large":
			break;
		default:
			fs = "large";
	}
	createCookie("FontSize", fs, 365);
	setStylesheet(fs);
}