Password Validation

[Ashfaque Sayani]

i want to enforce that my password should have a combination of alphabets ,digits and one special character.
if all three are present then only it shuld be valid.

if a user enters only digits as a password, it should not accept.
same for the alphabets.

i want to do the validation in javascript.

please suggest ASAP.

[sani723]

may be this help u

<script type="text/javascript">

function checkForm(form)
{
if(form.username.value == "") {
alert("Error: Username cannot be blank!");
form.username.focus();
return false;
}
re = /^\w+$/;
if(!re.test(form.username.value)) {
alert("Error: Username must contain only letters, numbers and underscores!");
form.username.focus();
return false;
}

if(form.pwd1.value != "" && form.pwd1.value == form.pwd2.value) {
if(form.pwd1.value.length < 6) {
alert("Error: Password must contain at least six characters!");
form.pwd1.focus();
return false;
}
if(form.pwd1.value == form.username.value) {
alert("Error: Password must be different from Username!");
form.pwd1.focus();
return false;
}
re = /[0-9]/;
if(!re.test(form.pwd1.value)) {
alert("Error: password must contain at least one number (0-9)!");
form.pwd1.focus();
return false;
}
re = /[a-z]/;
if(!re.test(form.pwd1.value)) {
alert("Error: password must contain at least one lowercase letter (a-z)!");
form.pwd1.focus();
return false;
}
re = /[A-Z]/;
if(!re.test(form.pwd1.value)) {
alert("Error: password must contain at least one uppercase letter (A-Z)!");
form.pwd1.focus();
return false;
}
} else {
alert("Error: Please check that you've entered and confirmed your password!");
form.pwd1.focus();
return false;
}

alert("You entered a valid password: " + form.pwd1.value);
return true;
}

</script>