// JavaScript Document
function goLink(lang) {
	var myString = document.location.search;
	if(myString) {
		rExp =  /lang=[a-z\s]{2}/gi
		if(rExp.test(myString)) {
			var results = myString.replace(rExp, "lang=" + lang);
			document.location.href = results;
		} else {
			document.location.href = myString + "&lang=" + lang;
		}
	} else {
		document.location.href="?lang=" + lang;
	}
}