jQuery select inputs with more than one class

Question

I have a number of inputs with multiple class:

<p><span>Efectivo X: </span><input type="text" class="montox numero caja1" name="mefectx" id="mefectx" maxlength="10" placeholder="0"/>&nbsp;<input type="text" class="montox numero caja2" name="mefectx" id="mefectx" maxlength="10" placeholder="0"/></p>
        <p><span>Tarjeta de Cr&eacute;dito X: </span><input type="text" class="montox numero caja1" name="mtdcx" id="mtdcx" maxlength="10" placeholder="0"/>&nbsp;<input type="text" class="montox numero caja2" name="mtdcx" id="mtdcx" maxlength="10" placeholder="0"/></p>

I want to sum all input with class (montox caja1):

var montosx = $('[class="montox"][class="caja1"]').sumVal();
        $('#tcajax').val(montosx);

But that code doesn't work.

Answer 1

Is your sumVal function working as expected? This will get all elements that have both classes:

var montosx = $('.montox.caja1').sumVal();
$('#tcajax').val(montosx);