我跟着视频做的啊 怎么出错了

Question

我不知道那个步骤出了错  也跟着视频重新对了一遍   还请哪位大神解救一下

Answer 1

63583

26537

93648

52401

03378

74459

01783

73204

44750

82436

16093

99910

34293

77790

32886

37099

96208

90378

96052

09645

92705

01097

52160

75131

07619

03726

23353

86550

08633

05439

10044

31764

09511

49973

32976

75207

09550

09551

98339

43952

28733

76290

32866

43967

54076

49863

19955

43208

09662

10633

87309

35108

19862

38845

19973

32885

98410

12885

08751

10744

20743

28751

42976

54084

87311

Answer 2

https://www.imooc.com/wenda/detail/333195

https://www.imooc.com/wenda/detail/338104

https://www.imooc.com/wenda/detail/341333

https://www.imooc.com/wenda/detail/349765

https://www.imooc.com/wenda/detail/340295

https://www.imooc.com/wenda/detail/344260

https://www.imooc.com/wenda/detail/347652

https://www.imooc.com/wenda/detail/333079

https://www.imooc.com/wenda/detail/347332

https://www.imooc.com/wenda/detail/347043

https://www.imooc.com/wenda/detail/342533

https://www.imooc.com/wenda/detail/353721

https://www.imooc.com/wenda/detail/341718

https://www.imooc.com/wenda/detail/332846

https://www.imooc.com/wenda/detail/353006

https://www.imooc.com/wenda/detail/347476

https://www.imooc.com/wenda/detail/339066

https://www.imooc.com/wenda/detail/340565

https://www.imooc.com/wenda/detail/332710

https://www.imooc.com/wenda/detail/333420

https://www.imooc.com/wenda/detail/337590

https://www.imooc.com/wenda/detail/354489

https://www.imooc.com/wenda/detail/335161

https://www.imooc.com/wenda/detail/341216

https://www.imooc.com/wenda/detail/352220

https://www.imooc.com/wenda/detail/351238

https://www.imooc.com/wenda/detail/333248

https://www.imooc.com/wenda/detail/354223

https://www.imooc.com/wenda/detail/331944

https://www.imooc.com/wenda/detail/348389

https://www.imooc.com/wenda/detail/343243

https://www.imooc.com/wenda/detail/347441

https://www.imooc.com/wenda/detail/353402

https://www.imooc.com/wenda/detail/338937

https://www.imooc.com/wenda/detail/350520

https://www.imooc.com/wenda/detail/335116

https://www.imooc.com/wenda/detail/333767

https://www.imooc.com/wenda/detail/353408

https://www.imooc.com/wenda/detail/332076

https://www.imooc.com/wenda/detail/345840

https://www.imooc.com/wenda/detail/344567

https://www.imooc.com/wenda/detail/347504

https://www.imooc.com/wenda/detail/343928

https://www.imooc.com/wenda/detail/332384

https://www.imooc.com/wenda/detail/355889

https://www.imooc.com/wenda/detail/333088

https://www.imooc.com/wenda/detail/354626

https://www.imooc.com/wenda/detail/332304

https://www.imooc.com/wenda/detail/354447

https://www.imooc.com/wenda/detail/353557

https://www.imooc.com/wenda/detail/337243

https://www.imooc.com/wenda/detail/349292

https://www.imooc.com/wenda/detail/350672

https://www.imooc.com/wenda/detail/336501

https://www.imooc.com/wenda/detail/355437

https://www.imooc.com/wenda/detail/352346

https://www.imooc.com/wenda/detail/334516

https://www.imooc.com/wenda/detail/339420

https://www.imooc.com/wenda/detail/348573

https://www.imooc.com/wenda/detail/352991

https://www.imooc.com/wenda/detail/336576

https://www.imooc.com/wenda/detail/343715

https://www.imooc.com/wenda/detail/355267

https://www.imooc.com/wenda/detail/340554

https://www.imooc.com/wenda/detail/354096

https://www.imooc.com/wenda/detail/333581

https://www.imooc.com/wenda/detail/332009

https://www.imooc.com/wenda/detail/349060

https://www.imooc.com/wenda/detail/348076

https://www.imooc.com/wenda/detail/347219

https://www.imooc.com/wenda/detail/344536

https://www.imooc.com/wenda/detail/347259

https://www.imooc.com/wenda/detail/354199

https://www.imooc.com/wenda/detail/342827

https://www.imooc.com/wenda/detail/354416

https://www.imooc.com/wenda/detail/354719

https://www.imooc.com/wenda/detail/343617

https://www.imooc.com/wenda/detail/352650

https://www.imooc.com/wenda/detail/339632

https://www.imooc.com/wenda/detail/351029

Answer 3

https://www.imooc.com/wenda/detail/333195

https://www.imooc.com/wenda/detail/338104

https://www.imooc.com/wenda/detail/341333

https://www.imooc.com/wenda/detail/349765

https://www.imooc.com/wenda/detail/340295

https://www.imooc.com/wenda/detail/344260

https://www.imooc.com/wenda/detail/347652

https://www.imooc.com/wenda/detail/333079

https://www.imooc.com/wenda/detail/347332

https://www.imooc.com/wenda/detail/347043

https://www.imooc.com/wenda/detail/342533

https://www.imooc.com/wenda/detail/353721

https://www.imooc.com/wenda/detail/341718

https://www.imooc.com/wenda/detail/332846

https://www.imooc.com/wenda/detail/353006

https://www.imooc.com/wenda/detail/347476

https://www.imooc.com/wenda/detail/339066

https://www.imooc.com/wenda/detail/340565

https://www.imooc.com/wenda/detail/332710

https://www.imooc.com/wenda/detail/333420

https://www.imooc.com/wenda/detail/337590

https://www.imooc.com/wenda/detail/354489

https://www.imooc.com/wenda/detail/335161

https://www.imooc.com/wenda/detail/341216

https://www.imooc.com/wenda/detail/352220

https://www.imooc.com/wenda/detail/351238

https://www.imooc.com/wenda/detail/333248

https://www.imooc.com/wenda/detail/354223

https://www.imooc.com/wenda/detail/331944

https://www.imooc.com/wenda/detail/348389

https://www.imooc.com/wenda/detail/343243

https://www.imooc.com/wenda/detail/347441

https://www.imooc.com/wenda/detail/353402

https://www.imooc.com/wenda/detail/338937

https://www.imooc.com/wenda/detail/350520

https://www.imooc.com/wenda/detail/335116

https://www.imooc.com/wenda/detail/333767

https://www.imooc.com/wenda/detail/353408

https://www.imooc.com/wenda/detail/332076

https://www.imooc.com/wenda/detail/345840

https://www.imooc.com/wenda/detail/344567

https://www.imooc.com/wenda/detail/347504

https://www.imooc.com/wenda/detail/343928

https://www.imooc.com/wenda/detail/332384

https://www.imooc.com/wenda/detail/355889

https://www.imooc.com/wenda/detail/333088

https://www.imooc.com/wenda/detail/354626

https://www.imooc.com/wenda/detail/332304

https://www.imooc.com/wenda/detail/354447

https://www.imooc.com/wenda/detail/353557

https://www.imooc.com/wenda/detail/337243

https://www.imooc.com/wenda/detail/349292

https://www.imooc.com/wenda/detail/350672

https://www.imooc.com/wenda/detail/336501

https://www.imooc.com/wenda/detail/355437

https://www.imooc.com/wenda/detail/352346

https://www.imooc.com/wenda/detail/334516

https://www.imooc.com/wenda/detail/339420

https://www.imooc.com/wenda/detail/348573

https://www.imooc.com/wenda/detail/352991

https://www.imooc.com/wenda/detail/336576

https://www.imooc.com/wenda/detail/343715

https://www.imooc.com/wenda/detail/355267

https://www.imooc.com/wenda/detail/340554

https://www.imooc.com/wenda/detail/354096

https://www.imooc.com/wenda/detail/333581

https://www.imooc.com/wenda/detail/332009

https://www.imooc.com/wenda/detail/349060

https://www.imooc.com/wenda/detail/348076

https://www.imooc.com/wenda/detail/347219

https://www.imooc.com/wenda/detail/344536

https://www.imooc.com/wenda/detail/347259

https://www.imooc.com/wenda/detail/354199

https://www.imooc.com/wenda/detail/342827

https://www.imooc.com/wenda/detail/354416

https://www.imooc.com/wenda/detail/354719

https://www.imooc.com/wenda/detail/343617

https://www.imooc.com/wenda/detail/352650

https://www.imooc.com/wenda/detail/339632

https://www.imooc.com/wenda/detail/351029

Answer 4

https://www.imooc.com/wenda/detail/333195

https://www.imooc.com/wenda/detail/338104

https://www.imooc.com/wenda/detail/341333

https://www.imooc.com/wenda/detail/349765

https://www.imooc.com/wenda/detail/340295

https://www.imooc.com/wenda/detail/344260

https://www.imooc.com/wenda/detail/347652

https://www.imooc.com/wenda/detail/333079

https://www.imooc.com/wenda/detail/347332

https://www.imooc.com/wenda/detail/347043

https://www.imooc.com/wenda/detail/342533

https://www.imooc.com/wenda/detail/353721

https://www.imooc.com/wenda/detail/341718

https://www.imooc.com/wenda/detail/332846

https://www.imooc.com/wenda/detail/353006

https://www.imooc.com/wenda/detail/347476

https://www.imooc.com/wenda/detail/339066

https://www.imooc.com/wenda/detail/340565

https://www.imooc.com/wenda/detail/332710

https://www.imooc.com/wenda/detail/333420

https://www.imooc.com/wenda/detail/337590

https://www.imooc.com/wenda/detail/354489

https://www.imooc.com/wenda/detail/335161

https://www.imooc.com/wenda/detail/341216

https://www.imooc.com/wenda/detail/352220

https://www.imooc.com/wenda/detail/351238

https://www.imooc.com/wenda/detail/333248

https://www.imooc.com/wenda/detail/354223

https://www.imooc.com/wenda/detail/331944

https://www.imooc.com/wenda/detail/348389

https://www.imooc.com/wenda/detail/343243

https://www.imooc.com/wenda/detail/347441

https://www.imooc.com/wenda/detail/353402

https://www.imooc.com/wenda/detail/338937

https://www.imooc.com/wenda/detail/350520

https://www.imooc.com/wenda/detail/335116

https://www.imooc.com/wenda/detail/333767

https://www.imooc.com/wenda/detail/353408

https://www.imooc.com/wenda/detail/332076

https://www.imooc.com/wenda/detail/345840

https://www.imooc.com/wenda/detail/344567

https://www.imooc.com/wenda/detail/347504

https://www.imooc.com/wenda/detail/343928

https://www.imooc.com/wenda/detail/332384

https://www.imooc.com/wenda/detail/355889

https://www.imooc.com/wenda/detail/333088

https://www.imooc.com/wenda/detail/354626

https://www.imooc.com/wenda/detail/332304

https://www.imooc.com/wenda/detail/354447

https://www.imooc.com/wenda/detail/353557

https://www.imooc.com/wenda/detail/337243

https://www.imooc.com/wenda/detail/349292

https://www.imooc.com/wenda/detail/350672

https://www.imooc.com/wenda/detail/336501

https://www.imooc.com/wenda/detail/355437

https://www.imooc.com/wenda/detail/352346

https://www.imooc.com/wenda/detail/334516

https://www.imooc.com/wenda/detail/339420

https://www.imooc.com/wenda/detail/348573

https://www.imooc.com/wenda/detail/352991

https://www.imooc.com/wenda/detail/336576

https://www.imooc.com/wenda/detail/343715

https://www.imooc.com/wenda/detail/355267

https://www.imooc.com/wenda/detail/340554

https://www.imooc.com/wenda/detail/354096

https://www.imooc.com/wenda/detail/333581

https://www.imooc.com/wenda/detail/332009

https://www.imooc.com/wenda/detail/349060

https://www.imooc.com/wenda/detail/348076

https://www.imooc.com/wenda/detail/347219

https://www.imooc.com/wenda/detail/344536

https://www.imooc.com/wenda/detail/347259

https://www.imooc.com/wenda/detail/354199

https://www.imooc.com/wenda/detail/342827

https://www.imooc.com/wenda/detail/354416

https://www.imooc.com/wenda/detail/354719

https://www.imooc.com/wenda/detail/343617

https://www.imooc.com/wenda/detail/352650

https://www.imooc.com/wenda/detail/339632

https://www.imooc.com/wenda/detail/351029

Answer 5

第17行脚本看下，应该是没有定义对象变量，导致无法设置其对象的属性，null不可能有属性，或者是属性被定义成不可设置值为null

Answer 6

你的id拼写有误，在第二张图片中显示，在你的行内代码中，id=“mian”，但是在第一张js代码中，你用的byId（"main"），这样是获取不到元素的，所以出错

Answer 7

15行 

var main = byId("#main")