warn user if all checkboxes are unchecked

Question

I have a form with a series of checkboxes. I want to warn the user, after they hit submit, if ALL of the checkboxes are unchecked. I\'m using the following code to report all

Answer 1

On the line

if (!legchecked){ alert("no riders")};

You're actually checking the existence of the object, not if it's empty. Since you're using jQuery, you could use the .isEmptyObject() function to check if the object is empty.

if($.isEmptyObject(legchecked)) {alert ("no riders")};