function BuscarTexto() {    
    document.frmBuscar.txtBuscar.value = Trim(document.frmBuscar.txtBuscar.value);
    if (document.frmBuscar.txtBuscar.value != ''){
        document.frmBuscar.action = 'index.php?Pagina=Buscar';
        document.frmBuscar.submit();
    }else{
        document.frmBuscar.txtBuscar.focus();
    }
}