Allow only Numbers(0-9) Or a-z, A-Z along with backspace , space in textbox

I have to textboxs  one is for name and other is for phone number.

I want to allow the user to allow enter only a-z , A-Z , .(dot) , backspace,Space in the name textbox

and only numbers 0-9 , - , backspace, Space in the number textbox.

i have tried these two but in both functions SPACE is not working , more over in name textbox some special char r also allowed.

any code please.
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