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Use regular expression full-width half-width restriction when entering input

Shulou Source: shulou.com Published: 2022-06-03 06:09:47 09月24日 Update

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Third, only integers are allowed. In fact, it is entirely possible to impose some restrictions in accordance with Article 3.

Function onlyNum ()

{

If (! (event.keyCode==46) & &! (event.keyCode==8) & &! (event.keyCode==37) & &! (event.keyCode==39))

If (! (event.keyCode > = 48&&event.keyCode=96&&event.keyCode)

Only English letters, numbers and underscores are allowed (implemented by the following two methods)

Third, only integers are allowed. In fact, it is entirely possible to impose some restrictions in accordance with Article 3.

Function onlyNum ()

{

If (! (event.keyCode==46) & &! (event.keyCode==8) & &! (event.keyCode==37) & &! (event.keyCode==39))

If (! (event.keyCode > = 48&&event.keyCode=96&&event.keyCode)

Only English letters, numbers and underscores are allowed (implemented by the following two methods)

Only Chinese characters are allowed to be input