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

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

	function setActiveStyleSheet(title) {
		//alert(title);
		var i, a, main;
		for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
			if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
				a.disabled = true;
				if(a.getAttribute("title") == title){
					createCookie("style", title, 365);
					a.disabled = false;
				}
			}
		}
	}

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


	addLoadEvent(function(e){
			var cookie = readCookie("style");
			if  (cookie==null || cookie=="null"){
				createCookie("style", 'A', 365);
				setActiveStyleSheet('A');
			}else{
				setActiveStyleSheet(cookie);
			}
		});