How to read the value entered in a text field is numeric or not in lotusscript?

How can we read an entered value in a text field to determine whether it is numeric or not through lotusscript?There is a text field i want the user to enter numeric characters only and not the alphabets and if any users enters alphabets then how can i determine it thru lotusscript?

Subject: How to read the value entered in a text field is numeric or not in lotusscript?

isNumeric?

From the Help:

Dim v As Variant

Print IsNumeric(v) ’ Output: True (v is EMPTY)

v = 12

Print IsNumeric(v) ’ Output: True

’ A string that is not interpretable as a number

v = “Twelve”

Print IsNumeric(v) ’ Output: False

’ A string that is interpretable as a number

v = “12”

Print IsNumeric(v) ’ Output: True