Masking in JavaScript

[rddart]

Hi,

I'm developing a small application and I'm validating with JavaScript. I have a particular field that needs particular data/characters in it. This field must be in this format: NN/ZZZZ

where NN must be between 06 and 20
/ is fixed in position 3
ZZZZ must be between 0001 and 9999

Nothing else should be accepted in this field. I want that when the user inputs 8/1, the field is automatically corrected to 08/0001.

Thanks for your help.

 

[dwarfthrower]

Well first you'd use .split('/') to split your value up into two chunks in an array (a left side of the slash "NN" and a right side of the slash "ZZZZ").

Then you can use parseInt() on each chunk to convert them into integer values. Once they're integers then you simply use the standard comparison operators to check that the integer values fall within your acceptable range.

Then pad out both sides with your leading zeros and join them together around a slash to get your final value.

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