function changeLanguage(){
	var curLang = local_lang == 'es' ? 'en' : 'es';
	var curLocation = document.location+"";
	if( curLocation.indexOf("&lang=")!= -1 ){
		curLocation = curLocation.replace( /&lang=../, "&lang="+curLang );
	}else{
		curLocation = curLocation+"&lang="+curLang;
	}
	document.location = curLocation;
}