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to check double values

 
Ranch Hand
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I want to check whether the entered value in a textbox is an integer or double value. How can I check this?

[Bear edit: fixed typo in subject: check is not spelled chk]
[ September 28, 2005: Message edited by: Bear Bibeault ]
 
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The value entered into a text box is always a string. Are you asking how to convert this string into int or double values?
 
Greenhorn
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Yes it will be stored as string


for double conversion

Double.getDouble(str)
 
Debashree Halder
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Actually I want to use keyPress function.

If user presses any thing other than 0-9 and decimal point (.) it will show an alert box telling "You can only enter numbers".

How can I achieve this?
 
Bear Bibeault
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That is a client-side activity that you must use Javascript for.

Moved to the HTML/Javascript forum.
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