used to decode reversed matched strings

alphaReverse.js

(function(){
    function alphaInvert(str) {
        var alpha = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
        var rev = alpha.slice().reverse(); // slice makes a copy of the array

        var result = "";
        str.split("").forEach(function(val,i,r){
            result += rev[alpha.indexOf(val)]; // indexOf IE9+
        });

        return result;
    }

    window.alphaInvert =  alphaInvert;
})();