function escondeDicaSearchBox() {
	var mostra_dica = $('search-box').hasClassName('search-box-com-dica');
	if (mostra_dica) {
		$('search-box').value = "";
		$('search-box').removeClassName('search-box-com-dica');
		$('search-box').addClassName('search-box-sem-dica');
	}
}

function mostraDicaSearchBox(texto_dica) {
	if ($('search-box').value == "") {
		$('search-box').removeClassName('search-box-sem-dica');
		$('search-box').addClassName('search-box-com-dica');
		$('search-box').value = texto_dica;
	}
}