function emptySearch(form){
lang = form.lang.value;
  if(lang=="23"){
	  error_1="Debe indicar una palabra de b\u00FAsqueda"
		error_2="La palabra a buscar debe tener al menos 3 letras"
	}
  
  else if(lang=="3"){
	  error_1="You must enter a search word"
		error_2="The keyword must be at least 3 letters"
	}
  
  else if(lang=="22"){
	  error_1="Vous devez entrer un mot de recherche"
		error_2="Le mot-clé doit \u00eatre d'au moins 3 lettres"
	}
  
  else lang="23";
  if (form.search_word.value == ""){
    alert(error_1);
    form.search_word.focus();
    return false;
  }
	else if(form.search_word.value.length < 3){
	  alert(error_2);
		form.search_word.focus();
		return false;
	}
	else{
	  return true;
	}
}