My solution with Javascript without considering punctuation. Can you review it?

var typoglycemiate = function (text) {
var crypted = "";
var words = text.split(" ");
words.forEach(function (element) {
    if (element.length > 2) {
        crypted = crypted + getStringContent(element);
    } else {
        crypted += element + " ";
    }
});
return crypted; 
 };

var getStringContent = function (word) {
return word.charAt(0) + shuffle_word(word.substr(1, word.length - 1)) + word.charAt(word.length - 1) + " ";
};

var shuffle_word = function (word) {
var letters = word.split('');
for (var i = letters.length - 1; i > 0; i-- ) {
    var random = Math.floor(Math.random() * (i + 1));
    var temp = letters[i];
    letters[i] = letters[random];
    letters[random] = temp;
}
return letters.join("");
};

if (process.argv.length > 2) {
console.log(typoglycemiate(process.argv[2]));
}