one of three formfields required

I've got a small validation question. What's the best/easiest way to validate a form to make sure that one of three different fields have a value. For example, I have three phone number fields (home,work,cell). I'd like a phone number in at least one of those fields. I can do it on the server side but I'd prefer the client as well. Thanks

I think this will work: if    (    $('#field1').length == 0         && $('#field2').length == 0         && $('#field3').length == 0   )       { $('#errorMessage').show();    } You've got to have something in at least one of the fields to not get the error message. Poking around a bit, I found the 'empty' method, too: if    (    $('#field1').is(':empty')         && $('#field2').is(':empty')         && $('#field3').is(':empty')  )       { $('#errorMessage').show();    } Even shorter: if    (    !$('#field1').val()         && !$('#field2').val()         && !$('#field3').val()        )       { $('#errorMessage').show();    } Need more explicit code? Rick I've got a small validation question. What's the best/easiest way to validate a form to make sure that one of three different fields have a value. For example, I have three phone number fields (home,work,cell). I'd like a phone number in at least one of those fields. I can do it on the server side but I'd prefer the client as well. Thanks