Javascript compatibility with IE and Firefox highlights _ javascript skills

Javascript IE and Firefox compatibility highlights 1. document. form. item
(1) existing problems:
Many statements such as document. formName. item ("itemName") exist in the existing code and cannot be run in MF.
(2) solution:
Use document. formName. elements ["elementName"]
(3) Others
See 2
2. Collection class Object Problems
(1) existing problems:
In the existing Code, many collection class objects are used (), which is acceptable to IE and cannot be used by MF.
(2) solution:
Use [] as the subscript operation. For example, change document. forms ("formName") to document. forms ["formName"].
For example, change document. getElementsByName ("inputName") (1) to document. getElementsByName ("inputName") [1]
(3) Others
3. window. event
(1) existing problems:
Window. event cannot be run on MF.
(2) solution:
MF events can only be used in the event. This problem cannot be solved. This can be changed as follows:
Original code (can be run in IE ):

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