Create ramdom String

gistfile1.js

var randobet = function(n) {
    var a = 'abcdefghijklmnopqrstuvwxyz'
      + 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
      + '0123456789';
    a = a.split('');
    var s = '';
    for (var i = 0; i < n; i++) {
      s += a[Math.floor(Math.random() * a.length)];
    }
    return s;
  };