window.addEvent('domready', function() {
	// language selection
    $("en").addEvent("click", english);
    $("de").addEvent("click", german);
	var language = navigator.language || navigator.systemLanguage || navigator.userLanguage;
	if (language.indexOf("de") == 0) german();
});

// language helper
function english() {
	$(document.documentElement).removeClass("lang-de").addClass("lang-en");
}
function german() {
	$(document.documentElement).removeClass("lang-en").addClass("lang-de");
}