function search_submit()
{

	var search_query = String(document.getElementById('search_query').value);
	search_query = search_query.replace(/^\s+/,"");
    if (search_query == '' || search_query.length <= 2)
    {
        alert('Por favor preencha o campo de pesquisa.');
        return false;
    }
    else
    {
        return true;
    }
}