Required attribute on multiple checkboxes with the same name? [duplicate]

Answer 1

A little jQuery fix:

$(function(){
    var chbxs = $(':checkbox[required]');
    var namedChbxs = {};
    chbxs.each(function(){
        var name = $(this).attr('name');
        namedChbxs[name] = (namedChbxs[name] || $()).add(this);
    });
    chbxs.change(function(){
        var name = $(this).attr('name');
        var cbx = namedChbxs[name];
        if(cbx.filter(':checked').length>0){
            cbx.removeAttr('required');
        }else{
            cbx.attr('required','required');
        }
    });
});