Javascript form entry checks.

[Energize]

What function can I use to determine if a char in a string is numeric?

 

[DireEmblem]

Try this, btw it does more than 0-9...

http://java.sun.com/j2se/1.3/docs/api/java/lang/Character.html#isDigit(char)

 

[Augmented]

You can check if it's not a number - isNaN and flip the return value to get true for numbers.

var string = '42';
alert(!isNaN(string));

 

[Energize]

Hmm I get the error message (name.charAt(i)).isLetter() is not a function.

 

[Augmented]

Hmm I get the error message (name.charAt(i)).isLetter() is not a function.

charAt()/isLetter() are Java functions, not Javascript.

 

[Energize]

Ah, I didn't think you could use java functions either but the other poster decieved me.

 

[DireEmblem]

my bad, misread post

 

[SimonCHere]

var string = name.charAt(i);
alert(!isNaN(string));