试试这个：

HTML

<select class="sel">
    <option value="a">Option A</option>
</select>

jQuery

jQuery(document).ready(function($){
    var option={
        "a":"option a",
        "b":"option b",
        "c":"option c"
    };
    $('.sel').on('click',function(){
        $('.sel').html('');
       $.each(option,function(i,n){
          $('.sel').append('<option value='+i+'>'+n+'</option>');
        });

    });
    $('.sel').on('change',function(){
        var selected_val=$(this).val();
        var selected_option=$("option:selected",this).text();
        $('.sel').html('');

          $('.sel').append('<option value='+selected_val+'>'+selected_option+'</option>');

    });

});

这是演示：http: //jsfiddle.net/mHGQs/