Reg Ex help for password validation

mat41 · January 23rd, 2005, 09:17 PM

I have an annoying little bit of code that works, however I would like to shorten it. My objective is to validate a password string to
include a mix of alphanumeric characters and a minimum of seven characters. I find Reg Exp complicated, my trial and error getting it all into "if (!re.test(myString))" part of the code has been unsuccessful.

      var myString = document.logInForm.pWord.value;
      if(myString.length<7)
      {
        alert("Your password must be at least seven characters in length.");
        document.logInForm.pWord.focus();
        return(false);
      }
      var re = /^\w*(?=\w*\d)(?=\w*[a-zA-Z])\w*$/
      if (!re.test(myString))
      {
         alert("Your password must be alphanumeric");
         document.logInForm.pWord.focus();
         return(false);
      }

TYIA

Wind is your friend
Matt

Vadivel · January 24th, 2005, 01:09 AM

How about this?

<html>
<head>
<script language="javascript">
  var myString = "abc1231" //document.logInForm.pWord.value;
  var re = /^[\w]{1,7}$/
  if (!re.test(myString))
  {
    alert("Your password must be alphanumeric"); //change the msg to include length of password also
  }
  else
  {
    alert("Pass");
  }
</script>
</head>
<body></body>
</html>

Best Regards
Vadivel

MVP ASP/ASP.NET
http://vadivel.thinkingms.com

mat41 · January 24th, 2005, 01:41 AM

Cheers however that doesnt seem to validate the length

Wind is your friend
Matt

Vadivel · January 24th, 2005, 02:32 PM

It does validate the length as well!
To check that .. change the variable myString to some string ...say "abc123111". You could see I have validated the length by saying {1,7} in the regular expression. It means at least it needs one character and the max it can have is 7. Hope this helps.

Best Regards
Vadivel

MVP ASP/ASP.NET
http://vadivel.thinkingms.com

mat41 · January 24th, 2005, 05:57 PM

My appologies, it does indeed. It didnt seem to yesturday, obviously me using it incorrectly - thanking you.

Wind is your friend
Matt

Vadivel · January 25th, 2005, 12:16 AM

I am glad that my code helped :)

Best Regards
Vadivel

MVP ASP/ASP.NET
http://vadivel.thinkingms.com

prashanth.j · January 30th, 2007, 08:54 AM

Hi ,

I want a regular expression in java script that should return true if it contains
[a-z] and [A-Z] and [0-9].I tried "/^[a-zA-
z]{0,55}$/" but it is taking or condition between [a-z] , [A-z]
i want and condition to be implemented in between [a-z] , [A-z]
Can any one help me on this?:)

vinod_yadav1919 · February 1st, 2007, 04:29 AM

Hii prashanth.j!!

replace "/^[a-zA-z]{0,55}$/" with
"/^[a-zA-Z]{0,55}$/"

hope this will help you

Cheers :)

vinod