// Cookie-Wert auslesen: 
function getCookieVal(offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
	endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}
//Cookie lesen:
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;
}
// Cookie setzen:
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" : "");
}
// Überprüfung, ob Cookie gesetzt:
function checkLanguage(pageLang){
	var homeDE = "http://www.chemiebuero.de/index.php";
	var homeEN = "http://www.chemiebuero.de/index_eng.php";
	var homeIT = "http://www.chemiebuero.de/index_it.php";
	var cookieLang = GetCookie('GUIlanguage');
	if (cookieLang==null) {
		cookieLang="DE";
		SetCookie('GUIlanguage', cookieLang, exp);
	}
	else if(cookieLang!=pageLang){
		eval('var url = home' + cookieLang);
		location.href = url;
	}
}
var expDays = 365;
var exp = new Date(); 
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));