Text Input Validation

[Thuy]

I would like to validate a user text box input, to make sure it contains the alphabetic and numeric characters only. Is there any function in Javascript's library performing this checking?

Thank you for your help,
Thuy

[skriptor]

Hi,
try this:

a = 'huhu"huhu'
alert ( a.search( /[^A-Za-z0-9]/ ));

Good luck, skriptor

[Thuy]

This is my validation function. It works just fine, but I thought it would be nicer if there is any built in function.

function InvalidPW(){
var Password = document.NewMember.Password1.value;
for(var i = 0; i < Password.length; i++){
if((Password[i] < "0") || (Password[i] > "9" && Password[i] < "A") ||
(Password[i] > "Z" && Password[i] < "a") ||(Password[i] > "z"))
return false;
}
return true;
}

Also, thank you for your response Skriptor. I'll try your.

Thuy

[Thuy]

Thank you Skriptor. It works, and very clean.

Thuy