function TrocaCampo(de,para,caracteres){
        var destino= document.getElementById(para);
        if(de.value.length >= caracteres){
            destino.focus();
        }
    }
    
    function Conteudo(c){
        var t= c == '' ? 'Home.php' : c;
        var loader= '<div style="text-align: center;"><img src="imagens/main_loader.gif" width="25" alt="Carregando..." /></div>';
        $('#divconteudo').html(loader);
        jQueryGet('#divconteudo','ajax.php?c=' + t);
    }