SO - 18545005

by Arun P Johny

HTML

<select id="YesOrNo" name='YesOrNo'>
    <option data-aob="" value=''>Select Yes/No</option>
    <option data-aob="Yes" value='1' selected>Yes</option>
    <option data-aob='No' value='2'>No</option>
</select>
<select id='Source' name='Source'>
    <option value=''>Select Source</option>
    <option data-aob='Yes' value='1'>Yes1</option>
    <option data-aob='Yes' value='2'>Yes2</option>
    <option data-aob='No' value='3'>No1</option>
    <option data-aob='No' value='4'>No2</option>
</select>
<select id="Type" name='Type'>
    <option value=''>Select Type</option>
    <option data-aob='No' value='1'>No1</option>
    <option data-aob='No' value='2'>No2</option>
    <option data-aob='No' value='3'>No3</option>
    <option data-aob='No' value='4'>No4</option>
    <option data-aob='Yes' value='5'>Yes</option>
    <option data-aob='No' value='6'>No5</option>
    <option data-aob='No' value='7'>No6</option>
</select>

JavaScript

var sourceHtml = $('#Source').html();
var typeHtml = $('#Type').html();
$('#YesOrNo').on('change', function () {
    var sources = $(sourceHtml);
    var types = $(typeHtml);
    var aob = $(this).find('option:selected').data('aob');

    if(aob){
        sources = sources.filter('[data-aob="' + aob + '"]');
        types = types.filter('[data-aob="' + aob + '"]');
    }
    $('#Source').empty().append(sources)
    $('#Type').empty().append(types)
}).triggerHandler('change');