Answers for "how to disable auto sort option in select box jquery"

disable option dropdown jquery

//disable by value
$("#ddlList option[value='jquery']").attr("disabled","disabled");

//disable by text
$('#ddlList option:contains("HTML")').attr("disabled","disabled");

how to disable time option in select jquery

$('#fromtime').on('change', function(){
    var totimeValues = [];
    
    var fromTime = $(this).val();

    $('#totime option').filter(function() {
        return $(this).val() <= fromTime;
    }).prop('disabled', true);

    
});