javascript - Value from comma separated select option values and append the second value to a other select option -

i'm struggling question, how can value comma separated select option value , append second value other select option? html looks

<select id="firstselecter_id1">  <option value"first value, second value, third value">option1</option> <option value"first value, second value, third value">option2</option> <option value"first value, second value, third value">option3</option> <option value"first value, second value, third value">option4</option>  </select>  <select id="secondselecter_id2">  <option value"second value">option1-a</option> <option value"second value">option2-a</option> <option value"second value">option3-a</option> <option value"second value">option4-a</option>  </select>        var entry6 = $('#id_6')     entry6.on('change', 'select#firstselecter_id1', function (e) { ...     option value ,second .append() #secondselecter_id2 new option value ="" ... } 

many if can give me idea , hope have asked question right , understandable regards maty

try

$('#select_1 option').each(function(){    var secondval = this.value.split(',')[1].trim(),               $opt = $('<option>').val(secondval).text($(this).text());        $('#select_2').append($opt); });