observing: $(‘mycheckbox’).observe(‘click’, function(e){alert(‘checked = ‘ + this.checked);}); setting throught scripting: $(‘mycheckbox’).checked = true; $(‘mycheckbox’).setAttribute(‘checked’, true); $(‘mycheckbox’).setValue(”); // will un-check/null value $(‘mycheckbox’).setValue(‘anything’); // will check/on value $(‘mycheckbox’).click(); // will toggle the checkbox… Read More