JQuery: do something with double condition [duplicate]

This question already has an answer here:

• To get selected value of a dropdown (<select>) element in jQuery 16 answers

I'm not a jQuery coder, i have to do something if the first select is "January" and the second one is "1", i have tried with this...

$('.selectDay option').click(function(){
if (!$('.selectMonth option').val()=='January' && !$('.selectDay option').val()=='1') {
//doSomething
}

Can you help me, please?