var expDays = 9999;  // Days to expire
var standardStyle = '1'; // Default style
var cName = 'switchstyle';
var cssPath = 'styles/';

var ScreenCSS_1 = 'blue.css';
var ScreenCSS_2 = 'green.css';
var ScreenCSS_3 = 'red.css';
var ScreenCSS_4 = 'tan.css';

function setUserStyle(){
	var style = GetCookie(cName);
	if (style == null) {
		style = standardStyle;
	}
	if (style == "1") { document.write('<link rel="stylesheet" type"text/css" href="' + cssPath + ScreenCSS_1 + '" media="screen">'); }
	if (style == "2") { document.write('<link rel="stylesheet" type"text/css" href="' + cssPath + ScreenCSS_2 + '" media="screen">'); }
	if (style == "3") { document.write('<link rel="stylesheet" type"text/css" href="' + cssPath + ScreenCSS_3 + '" media="screen">'); }
	if (style == "4") { document.write('<link rel="stylesheet" type"text/css" href="' + cssPath + ScreenCSS_4 + '" media="screen">'); }
	var style = "";
	return style;
}

var exp = new Date();
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));

// Function to get the settings of the user
function getCookieVal (offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
	endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}

// Function to get the settings of the user
function GetCookie (name) {
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
		return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break;
	}
	return null;
}

// Function to remember the settings
function SetCookie (name, value) {
	var argv = SetCookie.arguments;
	var argc = SetCookie.arguments.length;
	var expires = (argc > 2) ? argv[2] : null;
	var path = (argc > 3) ? argv[3] : null;
	var domain = (argc > 4) ? argv[4] : null;
	var secure = (argc > 5) ? argv[5] : false;
	document.cookie = name + "=" + escape (value) +
	((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
	((path == null) ? "" : ("; path=" + path)) +
	((domain == null) ? "" : ("; domain=" + domain)) +
	((secure == true) ? "; secure" : "");
}

// Function to remove the settings
function DeleteCookie (name) {
	var exp = new Date();
	exp.setTime (exp.getTime() - 1);
	var cval = GetCookie (name);
	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}

// This function is used when the user gives his selection
function doRefresh(){
	location.reload();
}

function setStyle(styleId){
	SetCookie(cName, styleId, exp); doRefresh(); return false;	
}

// This will call the main function.  Do not remove this, because otherwise this script will do nothing...
document.write(setUserStyle());