checkbox checked jquery example event

Example 1: events on checkbox in jquery

$(document).ready(function() {
    //set initial state.
    $('#textbox1').val($(this).is(':checked'));

    $('#checkbox1').change(function() {
        if($(this).is(":checked")) {
            var returnVal = confirm("Are you sure?");
            $(this).attr("checked", returnVal);
        }
        $('#textbox1').val($(this).is(':checked'));        
    });
});

Example 2: oncheck event jquery

$(".checkbox").change(function() {
    if(this.checked) {
        //Do stuff
    }
});