$(document).ready(function() {
        $('.child_ages').hide();
        var max_children = 5;
        var minimum_child_age = 0;
        var maximum_child_age = 17;
        var child_ages_div = $('.child_ages');
        var child_age_input = $('<select class="child_age" name="opt_child_0" style="margin-top:1em"></select>');
        for (var i=minimum_child_age;i<=maximum_child_age;i++) {
            var option = $('<option>'+i+'</option>');
            child_age_input.append(option);
        }
        var child_age_hidden = child_ages_div.children().slice(0,1);
        $('#no_child').change(function() {
            var n_children = $(this).val();
            child_ages_div.html('');
            for (var i=0;i<n_children;i++) {
                input = child_age_input.clone();
                input.attr('name','opt_child_'+i);
                child_ages_div.append(input);
            }
            for (var i=n_children;i<max_children;i++) {
                input = child_age_hidden.clone();
                input.attr('name','opt_child_'+i);
                child_ages_div.append(input);
            }
            child_ages_div.hide();
            child_ages_div.fadeIn("fast");
		});
		
    });