JAVASCRIPT

jquery checkbox checked

//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
}

jquery checkbox checked

$("checkbox").is(":checked")

jquery checkbox checked

 $("#general_no").prop( "checked", true);

how to checkedbox jquery

//jQuery 1.6+ use
$('.checkbox').prop('checked', true);
//jQuery 1.5.x and below use
$('.checkbox').attr('checked', true);

$("#checkboxid").prop('checked', true);  // Checks the box
$("#checkboxid").prop('checked', false);

jquery selector checked

$("input:checked")

checkbox jquery checked

var isExpanded = $(this).attr('checked') == "checked";