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I used the search but couldn't find anything to do with exactly what I need.

 

I have three text fields on a form. These three fields are:

 

1. Sub Total Price (Enabled)

2. 4% Surplus of Sub Total (Disabled)

3. Total (Disabled)

 

This form needs to allow the user to edit the sub total price, and with some simple JS I have made the other fields adjust accordingly. Now there is no validation in JS to prevent a user inputting an alpha character like 'aaa' and the returned values from the simple JS that I mentioned before are simply 'NaN' as you would expect.

 

What I am looking for is a way to make an input textfield numerical only; the field should only accept the input of numerical characters.

 

Thanks in advance.

 

Xur~

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