custom field dynamically checks

[Amit Shukla, modificado 11 Anos atrás.]

Hi all,

I have added some custom field in my documents library portlet. now I want to add some checks on that.

for example
i have added to text boxes for fields A1 and A2.now I want that A1 should be always numeric and value of A2 will generate on the basis of A1.

Please any body help me.how can i do this and in which class i have to add this checks

Thanks

Amit Shukla