set option of select tag using jquery mobile

Question

HTML

<table>
    <tr>
        <td style="align-content: center">
            <select id="start-lunch-hour" data-native-menu="false" data-overlay-theme="d" data-theme="b" name="start-time-hour" tabindex="-1" data-inline="true" data-icon="false">
                <option value="13">--</option>
                <option value="1">01</option>
                <option value="2">02</option>
                <option value="3">03</option>
                <option value="4">04</option>
                <option value="5">05</option>
                <option value="6">06</option>
                <option value="7">07</option>
                <option value="8">08</option>
                <option value="9">09</option>
                <option value="10">10</option>
                <option value="11">11</option>
                <option value="12" selected="selected">12</option>
            </select>
        </td>
        <td style="align-content: center">
            <fieldset data-role="controlgroup" data-type="horizontal">
                <select id="start-lunch-minute-digit1" data-native-menu="false" data-overlay-theme="d" data-theme="b" name="start-time-minute-digit1" tabindex="-1" data-scroll="true" data-inline="true" data-icon="false">
                    <option value="13">--</option>
                    <option value="0" selected="selected">0</option>
                    <option value="1">1</option>
                    <option value="2">2</option>
                    <option value="3">3</option>
                    <option value="4">4</option>
                    <option value="5">5</option>
                </select>
                <select id="start-lunch-minute-digit2" data-native-menu="false" data-overlay-theme="d" data-theme="b" name="start-time-minute-digit2" tabindex="-1" data-scroll="true" data-inline="true" data-icon="false">
                    <option value="13">--</option>
                    <option value="0" selected="selected">0</option>
                    <option value="1">1</option>
                    <option value="2">2</option>
                    <option value="3">3</option>
                    <option value="4">4</option>
                    <option value="5">5</option>
                    <option value="6">6</option>
                    <option value="7">7</option>
                    <option value="8">8</option>
                    <option value="9">9</option>
                </select>
            </fieldset>
        </td>
    </tr>
</table>

jQuery

$(function () {
        $("#start-time-hour").change(function () {
            var data = $(this).find(":selected").val();
            //alert(data);
            if (data == 13) {
                // This field will be output.
                if ($("#start-time-minute-digit1").find(":selected").val() != 13) {
                    $("#start-time-minute-digit1").val(13).prop('selected', true);                        
                }
                if ($("#start-time-minute-digit2").find(":selected").val() != 13) {
                    $("#start-time-minute-digit2").val(13).prop('selected', true);
                }
                //alert($("#start-time-minute-digit1").find(":selected").val());
                //alert($("#start-time-minute-digit2").find(":selected").val());
            }
            else {
                // This is normal digit input value selection for time from dropdown.
            }
        });
    });

Three selects are there (value attrib is same as text displayed) start-time-hour options --,0,1,2.....9 start-time-minute-digit1 options --,0,1,...5 start-time-minute-digit2 options --,0,1,2.....9

On changing any of them to "--" option other two must change to "--". I wrote above function. Debuging shows values are changed but display text on page is not updated. currnetly Using jQuery mobile in .net C# mvc3.

Answer 1

Just that should be enough:

if (data == 13) {
    $("#start-time-minute-digit1, #start-time-minute-digit2").val(13);
}

And your selector is wrong for '#' should be:

$('#start-lunch-hour')

Or:

$('select[name=start-time-hour]')

Answer 2

Just change your id's start-time-minute-digit1 to start-lunch-minute-digit1 , start-time-minute-digit2 to start-lunch-minute-digit2 and start-time-hour to start-lunch-hour

DEMO FIDDLE

Answer 3

well you could do this:

function setSelectedOption(selectID, valueToSelect){

    $("#" + selectID + " option[value='" + valueToSelect + "']").attr('selected', 'selected');    
    $("#" + selectID).selectmenu('refresh');
}

$("#start-lunch-hour").change(function () {
    var data = $(this).val();     
    if (data == 13) {
        setSelectedOption("start-lunch-minute-digit1",13);   
        setSelectedOption("start-lunch-minute-digit2",13);   
    } 
});

working fiddle here: http://jsfiddle.net/REthD/25/

I hope it helps.