jquery: if ul is empty

Question

Okay I have a jQuery dialog box which has a form in it and I am at my wits end trying to figure this out... Lets see if I can verbalize what I am trying to do..

I have 3 text boxes. #apInterest, #apPayment and #apPrincipal in that exact order.

basic english terms of what i am trying to do:

on keyup in #apInterest if .val is less than 0 or greater than 99.99 trigger an error.. else check ul#mylist if it has any li, if not .hide

on keyup in #apPayment if .val is less than 0 trigger an error else check the list for li hide if not.

#apPrincipal is the same thing exactly as #apPayment

what I have right this moment

$('#apInterest').live("keyup", function(e) { var parent = $('.inter').parents("ul:first"); if ($('#apInterest').val() < 0 || $('#apInterest').val() > 99.99) {     $('.inter').remove();     $('#mylist').append('<li class="inter">Interest Rate cannot be below 0 or above 99.99</li>');     $('#popuperrors').show();     $(this).addClass('error'); } else {     $(this).removeClass('error');     $('.inter').remove();     alert(parent.children().text);     if (parent.children().length == 0){         $('#popuperrors').hide();     } } }); 

Although I have also tried

if ($("#mylist :not(:contains(li))") ){ $('#popuperrors').hide(); } 

I had a function similar to this for all 3 textboxes but none of what I have tried seems to work.. any ideas on how to complete this

Answer 1

if ($('#mylist li').length == 0) ...