Word Array to String

how to do this in Javascript or Jquery?

Please suggest in 2 steps:

1.- Word Array to Single Byte Array.

2.- Byte Array to String.

Maybe this can help:

function hex2a(hex) {
    var str = '';
    for (var i = 0; i < hex.length; i += 2)
        str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
    return str;
}