//check OS
var Mac = navigator.userAgent.indexOf("Mac")>0;
var Win = navigator.userAgent.indexOf("Win")>0;



//check browser & platform
var ie = (navigator.appVersion.indexOf("MSIE")>0)
var nav = (navigator.appName == "Netscape");
var Opera = navigator.userAgent.indexOf("Opera")>0
if (Opera) {
	nav = false;
	ie = false;
}



if (ie){
	var ieVersion = navigator.appVersion.substring(navigator.appVersion.indexOf("MSIE") + 5, navigator.appVersion.indexOf(";",navigator.appVersion.indexOf("MSIE")));
	var ie3 = ieVersion<4;
	var ie4 = ieVersion>=4 && ieVersion<4.5;
	var ie45 = ieVersion>=4.5 && ieVersion<5;
	var ie5 = ieVersion>=5 && ieVersion<5.5;
	var ie55 = ieVersion>=5.5 && ieVersion<6;
	var ie6 = ieVersion>=6;
	//alert("Internet Explorer, Version "+ieVersion);
}



if (nav){
	var navVersion = parseFloat(navigator.appVersion)
	var nav6 = navVersion==5;
	var nav47 = navVersion>=4.7 && navVersion<5;
	//alert("Netscape, Version "+navVersion);
}



function SSCapable() {
	if (ieVersion>=5 || navVersion>=5) {
		return true;
	} else {
		return false;
	}
}



function setActiveStyleSheet(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;		
			}
		}
	}
	//alert(document.cookie);
}



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) {
			alert(a.getAttribute("title"))
		}
	}
	return null;
}



function getPreferredStyleSheet() {
	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;
}



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=/";
	//alert(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];
		//alert(c);
		
		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 fontUp() { 
	if (SSCapable()) {	
		if ((iSelectedStyleSheet + 1) < aStyleSheet.length) {	
			iSelectedStyleSheet++;	
			//alert(iSelectedStyleSheet);
			setActiveStyleSheet("style"+aStyleSheet[iSelectedStyleSheet]);
		}
		return false;
	} else {
		return true;
	}
}



function fontDown() { 
	if (SSCapable()) {
		if (iSelectedStyleSheet != 0) {
			iSelectedStyleSheet--;
			//alert(iSelectedStyleSheet);
			setActiveStyleSheet("style"+aStyleSheet[iSelectedStyleSheet]);
		}		
		return false;
	} else {
		return true;
	}
}



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



window.onbeforeunload = function(e) {
	if (SSCapable()) {
		var title = aStyleSheet[iSelectedStyleSheet];
		//alert(document.cookie);
		createCookie("BaseFont", title, 365);
	}
}



function URLDecode(psEncodeString) {
	// Create a regular expression to search all +s in the string
	var lsRegExp = /\+/g;
	// Return the decoded string
	return unescape(String(psEncodeString).replace(lsRegExp, " ")); 
}



if (SSCapable()){
	//document.write(readCookie("SSAPermSettings=BaseFont"));
	var cookie = readCookie("BaseFont");
	cookie = URLDecode(cookie);
	//alert(cookie);
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet("style"+title);
	var aStyleSheet = new Array("x-small", "small", "medium", "large", "x-large");
	var iSelectedStyleSheet
	
	for(i=0; i < aStyleSheet.length; i++) {
		if (aStyleSheet[i]==cookie) {
		iSelectedStyleSheet = i
		};
	}
	
	if (typeof iSelectedStyleSheet == "undefined") {
		iSelectedStyleSheet = 1	
	};
	
	//alert(iSelectedStyleSheet);
	
	//var iSelectedStyleSheet = 1
}