Thread: JavaScript for Password Validity Tester

Hi. I am website developer. I am working on one live project where I use PHP as a frontend and mySQL as a backend also I use JavaScript for validation. In my login password field is there for that I want to write JavaScript for Password Validity Tester to check user password strength. I tried various course but none of them worked out me. If anybody has suitable code then let me know that.

Try the script which is given below which may solve your problem:

Code:

<script language="JavaScript">
var errorMsg = "";
var space  = " ";
fieldname   = document.myform.password; 
fieldvalue  = fieldname.value; 
fieldlength = fieldvalue.length; 

if (fieldvalue.indexOf(space) > -1) {
     errorMsg += "nPasswords cannot include a space.n";
}     
if (!(fieldvalue.match(/d/))) {
     errorMsg += "nStrong passwords must include at least one number.n";
}
if (!(fieldvalue.match(/^[a-zA-Z]+/))) {
     errorMsg += "nStrong passwords must start with at least one letter.n";
}
if (!(fieldvalue.match(/[A-Z]/))) {
     errorMsg += "nStrong passwords must include at least one uppercase letter.n";
}
if (!(fieldvalue.match(/[a-z]/))) {
     errorMsg += "nStrong passwords must include one or more lowercase letters.n";
}
if (!(fieldvalue.match(/W+/))) {
     errorMsg += "nStrong passwords must include at least one special character - #,@,%,!n";
}
if (!(fieldlength >= 7)) {
     errorMsg += "nStrong passwords must be at least 7 characters long.n";
}
     if (errorMsg != ""){
          msg = "______________________________________________________nn";
          msg += "test.n";
          msg += "______________________________________________________n";
          errorMsg += alert(msg + errorMsg + "nn");
          fieldname.focus();
          return false;
     }
     
     return true;
}

</script>

I have tried the given script but it didn’t solve my problem. Please try to provide some other solution.