function runAfterElementExists(jquery_selector, callback) {var checker = window.setInterval(function() {if ($(jquery_selector).length) {clearInterval(checker);callback();}}, 200);} var ArtNr = 'V1-8PAJ-23X7'; $('input[name="variationid"]').val('V1-8PAJ-23X7'); $(".ItemQuestionForm form > input[data-mail='subject']").val("Artikel-Nummer: " + ArtNr); $('.ItemQuestionForm input[name="Artikelnr."]').attr('disabled', 'disabled').val(ArtNr);