//using plane javascript if(document.getElementById('on_or_off_checkbox').checked) { //I am checked } //using jQuery if($('#on_or_off_checkbox').is(':checked')){ //I am checked }
$(your_checkbox).is(':checked');
if ($('[name="your_input_checkbox_name"]').is(":checked")) { // it is checked } else { // it isn't checked }
.is(':checked')
$('#' + id).is(":checked")