function consultar(formulario){
	var mes = formulario.cboMes[formulario.cboMes.selectedIndex].value;
	var anno = formulario.cboAnno[formulario.cboAnno.selectedIndex].text;
	formulario.action ="niveles_pozos.php?idsw=consultar&mes="+mes+"&anno="+anno;
	formulario.submit();
}

function consultarAnual(formulario){
	var anno = formulario.cboAnno2[formulario.cboAnno2.selectedIndex].text;
	formulario.action ="niveles_pozos.php?idsw=anual&anno="+anno;
	formulario.submit();
}