Generates a random string, in this case an ID.

random.string.js

/* Optional customization ==========================
  
  generateID(); 
  
  generateID({ 
    base: 'video_', 
    length: 12, 
    charset: '1234asdf', 
    overkill: true 
  }); 
  
================================================= */

function generateID(opts){
  var length, charset, base, time, rand, output = '';
  
  if(typeof opts === 'undefined'){ opts = {}; }
  length = opts.length || 8;
  charset = opts.charset || 'abcdefghijklmnopqrstuvwxyz012345689';
  base = opts.base || '';
  time = ( opts.overkill === true ) ? true : false;
  
  charset = charset.split('');

  if( base !== '' ){ output += base; }
  for (var i = length; i >= 0; i--) { 
      output += charset[ Math.floor( Math.random() * charset.length ) ]; 
  }
  if( time === true ){ output += String(new Date().getTime()); }
  
  return output;
}