[jQuery] Re: if statement testing for null value

[Chuk]

Awesome!  Thanks for the suggestion that I probably should have
assumed to be true, JQuery Lover.  I just have one more question
concerning this.  Currently, I have the following code:

$('#equipmentNumber').keyup(function()
{
  $('#submit').attr('disabled', !($('#equipmentNumber').val() &&  $
('#description').val()  && $('#type').val()  && $('#department')  && $
('#location').val() ));
});

$('#description').keyup(function()
{
  $('#submit').attr('disabled', !($('#equipmentNumber').val() &&  $
('#description').val()  && $('#type').val()  && $('#department')  && $
('#location').val() ));
});

$('#type').change(function()
{
  $('#submit').attr('disabled', !($('#equipmentNumber').val() &&  $
('#description').val()  && $('#type').val()  && $('#department')  && $
('#location').val() ));
});

$('#department').change(function()
{
  ('#submit').attr('disabled', !($('#equipmentNumber').val() &&  $
('#description').val()  && $('#type').val()  && $('#department')  && $
('#location').val() ));
});

$('#location').change(function()
{
  $('#submit').attr('disabled', !($('#equipmentNumber').val() &&  $
('#description').val()  && $('#type').val()  && $('#department')  && $
('#location').val() ));
});


Is there a way that I can combine the functions?