function fontsizeup() {
	active = getActiveStyleSheet();
	switch (active) {
		case 'A' : 
			setActiveStyleSheet('font_A+');
		document.images.abc1.src = 'kuvat/i-pienenna.gif';
		document.images.abc2.src = 'kuvat/i-tekstikoko.gif';
		document.images.abc3.src = 'kuvat/i-suurenna.gif';
			break;
		case 'A+' : 
			setActiveStyleSheet('font_A++');
		document.images.abc1.src = 'kuvat/i-pienenna.gif';
		document.images.abc2.src = 'kuvat/i-tekstikoko.gif';
		document.images.abc3.src = 'kuvat/i-suurenna-ei.gif';
			break;
		case 'A++' :
			break;
		default :
			setActiveStyleSheet('font_A++');
		document.images.abc1.src = 'kuvat/i-pienenna.gif';
		document.images.abc2.src = 'kuvat/i-tekstikoko.gif';
		document.images.abc3.src = 'kuvat/i-suurenna-ei.gif';
			break;
	}
}

function fontsizeup_kouvola() {
	
	active = getActiveStyleSheet();
	
	
	switch (active) {
		case 'A' : 
			setActiveStyleSheet('font_A+');
			break;
		case 'A+' : 
			setActiveStyleSheet('font_A++');
			break;
		case 'A++' :
			break;
		default :
			setActiveStyleSheet('font_A++');
			break;
	}
}


function fontsizedown() {
	active = getActiveStyleSheet();	
	switch (active) {
		case 'A++' :
		setActiveStyleSheet('font_A+');
		document.images.abc1.src = 'kuvat/i-pienenna.gif';
		document.images.abc2.src = 'kuvat/i-tekstikoko.gif';
		document.images.abc3.src = 'kuvat/i-suurenna.gif';
			break;
		case 'A+' : 
			setActiveStyleSheet('font_A');
		document.images.abc1.src = 'kuvat/i-pienenna-ei.gif';
		document.images.abc2.src = 'kuvat/i-tekstikoko.gif';
		document.images.abc3.src = 'kuvat/i-suurenna.gif';
			break;
		case 'A' :
			break;
		default :
			setActiveStyleSheet('font_A');
		document.images.abc1.src = 'kuvat/i-pienenna-ei.gif';
		document.images.abc2.src = 'kuvat/i-tekstikoko.gif';
		document.images.abc3.src = 'kuvat/i-suurenna.gif';
			break;
	}
}

function fontsizedown_kouvola() {
	active = getActiveStyleSheet();	
	switch (active) {
		case 'A++' :
		setActiveStyleSheet('font_A+');
			break;
		case 'A+' : 
			setActiveStyleSheet('font_A');
			break;
		case 'A' :
			break;
		default :
			setActiveStyleSheet('font_A');
			break;
	}
}

function setActiveStyleSheet(title) {
	var i, a, main;
	
	
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
			
		if(a.getAttribute("rel").indexOf("alternate stylesheet") != -1 && a.getAttribute("title").indexOf("font") != -1 ) {
			a.disabled = true;
			//alert('A: disabling:' + a.title);			
			if(a.getAttribute("title") == title){
				a.disabled = false;
				//alert('A: enabling:' + a.title);
			}
		}
	}
}

function setActiveColorStyleSheet(title) {
	var i, b, main;
	for(i=0; (b = document.getElementsByTagName("link")[i]); i++) {
		if(b.getAttribute("rel").indexOf("alternate stylesheet") != -1 && b.getAttribute("title") && b.getAttribute("title").indexOf("sub") != -1 ) {
			b.disabled = true;
			//alert('B: disabling:' + b.title);
			if(b.getAttribute("title") == title){
				b.disabled = false;
				//alert('B: enabling:' + b.title);
			}
		}
	}
	return null;
}

function getActiveStyleSheet() {
	var i, a;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("alternate stylesheet") != -1 && a.getAttribute("title").indexOf("font") != -1 && !a.disabled) return a.getAttribute("title");
	}
	return null;
}

function getActiveColorStyleSheet() {
	var i, b;
	for(i=0; (b = document.getElementsByTagName("link")[i]); i++) {
		if(b.getAttribute("rel").indexOf("color stylesheet") != -1 && b.getAttribute("title").indexOf("sub") != -1 && !b.disabled) return b.getAttribute("title");
	}
	return null;
}

function getPreferredStyleSheet() {
	return ('A');
}

function getPreferredColorStyleSheet() {
	return ('subblue');
}

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 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 textVersion(version){
	var i, a, ver;

	ver = getVersion();
	switch(ver){
		case 'normal':
			ver = 'text';
			break;
		case 'text':
			ver = 'normal';
			break;
	}
	setVersion(ver);
}

function setVersion(title) {
	var i, a, main;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("alt")) {
			a.disabled = true;
			if(a.getAttribute("alt") == title) a.disabled = false;
		}
	}
}

function getVersion() {
	var i, a;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("alt") && !a.disabled) {
			return a.getAttribute("alt");
		}
	}
	return null;
}


window.onload = function(e) {
	var fontcookie = readCookie("fontstyle");
	var fonttitle = fontcookie ? fontcookie : getPreferredStyleSheet();
	setActiveStyleSheet(fonttitle);
	
	var colorcookie = readCookie("colorstyle");
	var colortitle = colorcookie ? colorcookie : getPreferredColorStyleSheet();
	setActiveColorStyleSheet(colortitle);

	var cookie = readCookie("alt");
	var version = cookie ? cookie : 'normal';
	setVersion(version);
}


window.onunload = function(e) {
	var fonttitle = getActiveStyleSheet();
	createCookie("fontstyle", fonttitle, 365);
		
	var colortitle = getActiveColorStyleSheet();
	createCookie("colorstyle", colortitle, 365);

	var version = getVersion();
	createCookie("alt", version, 365);
}

/*	
var fontcookie = readCookie("fontstyle");
var fonttitle = fontcookie ? fontcookie : getPreferredStyleSheet();
if (fonttitle == 'null') { fonttitle = getPreferredStyleSheet(); }
setActiveStyleSheet(fonttitle);

var colorcookie = readCookie("colorstyle");
var colortitle = colorcookie ? colorcookie : getPreferredColorStyleSheet();
if (colortitle == 'null') { colortitle = getPreferredColorStyleSheet(); }
setActiveColorStyleSheet(colortitle);

var cookie = readCookie("alt");
var alt = cookie ? cookie : 'normal';
if (alt == 'null') { alt = 'normal'; }
setVersion(alt);
*/