A Jquery Alpha range plugin

alpha.jquery.js

(function($){
    
    $.alphaRange = function(from , to , onlyLetters) {
        
         var startLetter = from || 'A',
             endLetter = to || 'Z',
             start = startLetter.charCodeAt(0),
             end = endLetter.charCodeAt(0),
             length = end - start,
             letter = 0,
             alphaOnly = onlyLetters || true,
             alphaRange = [];
        
                  
            for ( letter; letter <=  length; letter++) {
                currentLetter = String.fromCharCode(start + letter);
                if ( !alphaOnly || (alphaOnly && currentLetter.match(/[A-Za-z]/m))) {
                    alphaRange.push(currentLetter);
                }
            }
            
            return alphaRange;      
    }
    
})(jQuery)