function changeLanguage(_lang){
	var the_Date = new Date();
	the_Date.setTime(the_Date.getTime() + 1000 * 60 * 60 * 24 * 365 * 10);
	document.cookie = "_lang=" + _lang + "; expires=" + the_Date.toGMTString();
	var theURL = document.location.href;
	var start_point = theURL.indexOf("_lang=");
	if(start_point != -1){
		currLang = theURL.substring(start_point + 6, start_point + 8);
		theURL = theURL.replace("_lang=" + currLang, "_lang=" + _lang);
	} else if(theURL.indexOf("?") == -1){
		document.location = theURL + "?_lang=" + _lang;
	} else document.location = theURL + "&_lang=" + _lang;
	document.location = theURL;
}