Example of Javascript merging cells with the same content in a table_javascript tips

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合并前：

a	1	2	3	4	5
a	1	2	3	4	6
a	2	3	3	4
b	3	4	6	7
b	3	5	6	7
cc	2	3	4	5
cc	2	3	5	5
d	1	2	3	4
e	1	2	3	4

合并后：

a	1	2	3	4	5
a	1	2	3	4	6
a	2	3	3	4
b	3	4	6	7
b	3	5	6	7
cc	2	3	4	5
cc	2	3	5	5
d	1	2	3	4
e	1	2	3	4

JS:

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