Javascript : Generate random key with specific length

Was looking for a way to generate random string with Javascript today and also wanted to limit the random string length.

This code fragment below should do the job.

 // define the characters to pick from
 var chars ="0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz*&-%/!?*+=()";

 // note if you are looking for random integer, use this instead
 // var chars ="0123456789";

 // specify the length with keyLength parameter
 var generateKey = function generateKey(keyLength){

 var randomStr = '';

 for (var i=0; i < keyLength; i++) {
 var rnum = Math.floor(Math.random() * chars.length);
 randomStr += chars.substring(rnum,rnum+1);
 }
 return randomStr;
 };

Give this javascript a try when you want to generate random string value.