Result jQuery$('#check').click(function(){ if($(this).prop('checked') == false){ $('#submit').attr("disabled","disabled"); } else { $('#submit').removeAttr('disabled'); } });html<input type="checkbox" checked="checked" id="check"><a href="#">利用規約</a>に同意して送信する <input type="submit" id="submit" value="submit">viaHow do i disable a submit button when checkbox is uncheck?