[筆記] Relative Dropdown List

實習開發網站，常遇到一些功能需求要上網查詢，整理成筆記以後再用到就不用又從頭開始找，也希望幫助到正在找學這些功能的人

// get the one which just select
$('.form_select select').change(function(e) { 
  var current_selected = this.id;
  // get all Dropdown in the form
  // remove val of dropdowns except current select 
  $('.form_select select:not(#' + current_selected + ')').each(function () {
    $('#' + this.id).val('');
  });
});