set check jquery code example
Example 1: jquery checkbox set checked
//For jQuery 1.6 and above
$('#myCheckBoxID').prop('checked', true);
//For jQuery Before 1.6
$('#myCheckBoxID').attr('checked','checked');
Example 2: jquery set checkbox checked
<script>
//jQuery 1.6+ use
$('#checkbox').prop('checked', true);
//jQuery 1.5.x and below use
$('#checkbox').attr('checked', true);
</script>