为什么我的加减没有效果

Question

  for(var i=0;i<tr.length;i++)

      {

        tr[i].onclick=function(e){

            e=e||window.event;

            var el=e.srcElement;//触发事件元素

            var cls=el.className;

            var input=this.getElementsByTagName('input')[1];

            var val =parseInt(input.value);

            var reduce=this.getElementsByTagName('span')[1];

            switch(cls)

            {

                case'add';

                  input.value=val+1;

                  reduce.innerHTML='-';

                  getSubTotal(this);

                break;

                case 'reduce';

                 if(val>1){

                 input.value=val-1;

                }

                 if(input.value<=1)

                {

                reduce.innerHTML='';

                }

                getSubTotal(this);

                break;

                default;

                break;

            }

        }

      }

Answer 1

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

Answer 2

MZFOYUXUUHWBYOOOBRBBCFFOKNJPFPCMSYEUAEGABUUHNCFZPMCZPFBHCYAXGQMWGVSPEMJSVYVGCEOXGQGWTPSCLVKNWTDAJGDNQFVYHEHKNCGJMBRHEBRHEJFWZPROWTWFIIBSDARHYJDZPDZDNQFISIGCYURAQTXFOQTOEOFIEBEBJTGKNKHASZGNQHDNJMVLVFMOSPSORURUXVPDCYYVYYYNXWPCPUUHVCPJQRZNYRABUARUJALCNSBQNQRULKTXVZQSNAXBFJJZIYCCVLKOADKAQNSGPZGANTLMKFJNQDPMFXLVDAUFILNTGBZMMQUXVZRNGNIRJDUMOEJELZHKBOREWTEJVCHYQHQDBLKSZJSLNVKIHPZBJSGYXYNSKTFCSWDHGFCUNDOJFKISMNAHVXNJIMUTAUIUTKKROZQEYVEREYHHHOFTRBCEEOSISMMTMRFLQWBTHUIMKSFCRJNNENQJUUMLDLALNYVGIDKJJTXHNAETDATZXIUVUHGEDSJYNUYXMUYECDASWSCBHPAEQOFQGRTVIIQAPNPLYGVUONZGIEIWLOUQRXRFVPMHJOCTIMWOMEJHKBYYFSPXXNUUROOGLJNAAJBLGLXQNNOHCCACLABBGUGSTKYJTMTSEHZNVVNRMQEQPAANNFDIOEJAUNRRVCCXEXWGQQOOSMNKNAEPWGSCJVBOIFSGAQUYWCFSDJMJJRE

Answer 3

KMWMKAISBYNLHRNWMPZNEAYOEISBRGJAQGNDAWNXTJTWJMBEUKNQZEZZVDAQMCSISIBDAWNJZJMJDQTPMJSPSPSVIEOKHDGVSBSHQZCTWSILVSVXVROKADGDATILBEGDMCZJLHDNJMJGPGBAKKUYMWNXVFFWXJNQAKCPWIBSBIWGGTNBOROEHHYSPJZYRRBYOUOWAKNXFLCPRLYFSVVIIIVVZPJCDORLISIGQXQYUUKXDDZLMSPWZZPSBEELYQQQQNTBEEYFBKKUEUHBLPVRVLPIMOVLPPVVLLYLUOOLIOXRUUYOLBIQYLYRLHRRHUEGCZZMTCVCZPCGKURQWCPMWUAAGWGXDAGQTPPFWCZZPJFVFSYBIOSDRHXHVVZJSVFTSXDNGDKQZLVLWVYSPZZZMWGZPESPOJPCUKAZYLIMQMTJJRHAUAAQJQKDLBBJNKNNERONNUEUARIFSSNVPMIWXANEEOKARUVFVLSSQADDLHHNQOWYXAKEBKBHPWQMHCZFWQTGAUURXEHHEUFOIIFFYOFVIYSQJATTTGQAADCYYURBIOBCVOULMGTQMMLSWMZHKKXKHUHKJGAQAHRDCCJYCKBWKNDECRRIWKYZRFKFCQBWEPUHRSOQPYDTOFLIDDQDPIZOHUNAVIYZFBHVBRIPCFMPGWAKLTEPMCPVSCYSCZMPREBOHXEXRBVBVLOSOELPNDUGKFICSJJ

Answer 4

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

Answer 5

首先使用了中文标点，所以无论如何，请先认真检查