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Forms >>> Validation Password.

This script works like our Password Verifier, however, it also checks for a minimum length and invalid characters.

Enter your password twice.
(At least 6 characters, 12 characters max, and spaces are not allowed.)
Password:        

Verify password:

Add the below code to the <body> section of your page:

<script language="javascript" type="text/javascript">
/* Visit http://www.yaldex.com/ for full source code
and get more free JavaScript, CSS and DHTML scripts! */
<!-- Begin
function validatePwd() {
var invalid = " "; // Invalid character is a space
var minLength = 6; // Minimum length
var pw1 = document.myForm.password.value;
var pw2 = document.myForm.password2.value;
// check for a value in both fields.
if (pw1 == '' || pw2 == '') {
alert('Please enter your password twice.');
return false;
}
// check for minimum length
if (document.myForm.password.value.length < minLength) {
alert('Your password must be at least ' + minLength + ' characters long. Try again.');
return false;
}
// check for spaces
if (document.myForm.password.value.indexOf(invalid) > -1) {
alert("Sorry, spaces are not allowed.");
return false;
}
else {
if (pw1 != pw2) {
alert ("You did not enter the same new password twice. Please re-enter your password.");
return false;
}
else {
alert('Nice job.');
return true;
      }
   }
}
//  End -->
</script>
<form name=myForm onSubmit="return validatePwd()">
Enter your password twice.
<br>
(At least 6 characters, 12 characters max, and spaces are not allowed.)
<br>
<
pre>
Password:        <input type=password name=password maxlength=12>
<br>
Verify password: <input type=password name=password2 maxlength=12>
<br>
<
/pre>
<input type=submit value="Submit">
</form>

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