checkbox set checked jquery

1//jQuery 1.6+ use
2$('.checkbox').prop('checked', true);
3//jQuery 1.5.x and below use
4$('.checkbox').attr('checked', true);

1//jQuery 1.6+ use
2$('.checkbox').prop('checked', true);  //false for uncheck
3//jQuery 1.5.x and below use
4$('.checkbox').attr('checked', true);  //false for uncheck

1//jQuery 1.6+ use:
2$('.checkboxClass').prop('checked', true);
3//jQuery 1.5.x and below use:
4$('.checkboxClass').attr('checked', true);

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

1<input type="checkbox" name="vehicle3" value="Boat" checked>
2
3#If if helps you give it Thumbs up

1.prop('checked', true);
2