有Ajax的“select”吗?

replaceWith

slightly modified jsfidle

Please choose the product:<br/>
<!-- not all products; only what we have on stock -->
<input type="text" id="product">

$(document).ready(function() {

  $.getScript('available_products.php', function() {

    // we assume the server would return an array like this:
    // var products = ['33712:Product A', '12501:Product B', '14619:Product C'];

    var myoptions = '';
    $.each(
    products, function(n, p) {
        var pp = p.split(':');
        var i = pp[0];
        var v = pp[1];
        myoptions += '<option value="' + i + '">' + v + '</option>';
    });

    $('#product').replaceWith('<select id="product">' + myoptions + '</select>');

  });

});