W3School TIY Editor
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<!DOCTYPE html> <html> <head> <style>div { color:red; }</style> <script type="text/javascript" src="/jquery/jquery.js"></script> </head> <body> <form><p><input type="checkbox" /></p></form> <div></div> <script> var isFormParent = $("input[type='checkbox']").parent().is("form"); $("div").text("isFormParent = " + isFormParent); </script> </body> </html>