(function ($) { $(document).ready(function () { // Upload button is clicked $("#post").click(function(e) { // Make sure "Music" category is selected. if ($("#categories").find(":selected").val() == 0) { checkHasMainArtist(e); } }); /** * Make sure a main artist is selected. */ function checkHasMainArtist(e) { var has_main = false; $("select[id^=importance]").each(function() { if ($(this).find(":selected").val() == 1) { has_main = true; } }); if (!has_main) { alert('A "Main" artist is required'); // Don't POST the form. e.preventDefault(); } } }); })(jQuery);