You can use regular expression for this Pls look at the following code...
password=document.docname.pasword.value;
var expPassword = /^[a-z_A-Z]$/i;
       if(!expPassword.test(password)) {
       alert("Enter correct Password);
       document.docname.passowrd.focus();
       return false;}
       else{
       return true;}

----- Original Message ----- 
From: "Shaukat Desai" <shaukat.desai@g...>
To: "javascript" <javascript@p...>
Sent: Friday, November 17, 2000 10:32 AM
Subject: [javascript] form validation


> Hi,
> 
> I have a change password page. I want to be able to do the follwoing
> things:-
> 
> restricting the user to one and ten characters in a textbox and password
> contains at least one alphabetic character "a-z" or "A-Z".
> 
> Thanks
>