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<html><head><script src="//code.jquery.com/jquery-2.1.1.min.js"></script> <meta charset="utf-8"> <title>JS Bin</title></head><body> <div id="Drop1" class="wrong">1</div> <div id="Drop1" class="wrong">2</div></body></html>var $wrongFields = $('[id^="Drop"].wrong');if ($wrongFields.length && !$wrongFields.filter(':empty').length) { // at least one field exists with: // - id starting with "Drop" // - class of "wrong" // and none of the above fields is empty console.log('yay');}
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