SO-20654439

HTML

<input type="text" name="a" class="a" value="1" />
<a href="#" class="cl">Click</a>

JavaScript

var selected_locations = [];
$('.cl').click(function () {
    var loc_id = $('.a').val();
    alert(loc_id);
    selected_locations.push(loc_id);
    alert(selected_locations.join());
});