jquery checkbox checked value

1//using plane javascript 
2if(document.getElementById('on_or_off_checkbox').checked) {
3    //I am checked
4} 
5
6//using jQuery
7if($('#on_or_off_checkbox').is(':checked')){
8    //I am checked
9}

1if ($('#check_id').is(":checked"))
2{
3  // it is checked
4}

1//For jQuery 1.6 and above
2$('#myCheckBoxID').prop('checked', true);
3//For jQuery Before 1.6
4$('#myCheckBoxID').attr('checked','checked');

1console.log($('input[name="locationthemes"]:checked').serialize());
2
3//or
4
5$('input[name="locationthemes"]:checked').each(function() {
6   console.log(this.value);
7});

1if($('#on_or_off_checkbox').is(':checked')){
2    //I am checked
3}

1if ($('[name="your_input_checkbox_name"]').is(":checked"))
2{
3  // it is checked
4} else {
5  // it isn't checked	
6}