function setActiveStyleSheet(title) {
	var i, a, main;
	var objCngTxt;
	var objImg;
	var baseImg = new Array("medium", "large");

	//set CSS
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel") && a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
			a.disabled = true;
			if(a.getAttribute("title") == title) a.disabled = false;
		}
	}

	objCngTxt = document.getElementById("size");
	if( objCngTxt != null && objCngTxt != "" ){

		//init Image
		objImg = objCngTxt.getElementsByTagName("img");
		for( i = 1; i < objImg.length; i++ ){
			objImg[i].src = rootPath + "images/b_txt_" + baseImg[i-1] + ".png";
		}
	
		//set active Image
		if( title != "" && title != null && title != "null" ){
			objCngTxt = document.getElementsByName("txt_" + title);
			objCngTxt[0].src = rootPath + "images/b2_txt_" + title + ".png";
		} else {
			objCngTxt = document.getElementsByName("txt_medium");
			objCngTxt[0].src = rootPath + "images/b2_txt_medium.png";
		}
	}
}

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

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

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;
}

window.onload = function(e) {
	var cookie = readCookie("style");
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
}

window.onunload = function(e) {
	var title = getActiveStyleSheet();
	createCookie("style", title, 1);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);

function loadCSS(){
	var csslink	= '<link title="large" rel="alternate stylesheet" type="text/css" href="' + rootPath + 'css/font-l.css">';
	   csslink += '<link title="medium" rel="alternate stylesheet" type="text/css" href="' + rootPath + 'css/font-m.css">';
	document.write(csslink);
}