STYLES = {
	cookie : "",  
	title : "", 
	textSize : 0.7,
	
	setActiveStyleSheet : function(_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) a.disabled = false;
			}
		}
	},

	getActiveStyleSheet : function() {
		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;
	},

	getPreferredStyleSheet : function() {
		var i, a;
		for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
			if(a.getAttribute("rel").indexOf("style") != -1
				&& a.getAttribute("rel").indexOf("alt") == -1
				&& a.getAttribute("title")
			) return a.getAttribute("title");
		}
		return null;
	},
	
	onload : function(e) {
		STYLES.cookie = COOKIES.readCookie("style");
		STYLES.title = STYLES.cookie ? STYLES.cookie : STYLES.getPreferredStyleSheet();
		STYLES.setActiveStyleSheet(STYLES.title);
		var _textSize = COOKIES.readCookie("textSize");
		if(_textSize > 0) STYLES.textSize = parseFloat(_textSize); 
		STYLES.setBodyTextSize(STYLES.textSize);
	},
	
	onunload : function(e) {
		STYLES.title = STYLES.getActiveStyleSheet();
		COOKIES.createCookie("style", STYLES.title, 365);
		COOKIES.createCookie("textSize", STYLES.textSize, 365);
	},
	
	
	setBodyTextSize : function(ems){
		obj = document.getElementsByTagName("body")[0];
		obj.style.fontSize = STYLES.textSize + "em";		
	}
	
}

COOKIES = {
	createCookie : function(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=/";
	},

	readCookie : function(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;
	}
}

if (document.getElementsByTagName){
	EXTRAS.addEvent(window, 'load', STYLES.onload, false);
	EXTRAS.addEvent(window, 'unload', STYLES.onunload, false);
	}

STYLES.cookie = COOKIES.readCookie("style");
STYLES.title = STYLES.cookie ? STYLES.cookie : STYLES.getPreferredStyleSheet();
STYLES.setActiveStyleSheet(STYLES.title);