Convert array of byte values to base64 encoded string and break long lines, Javascript (code golf)

Question

This JavaScript function takes an array of numbers (in the range 0-255) and converts to a base64-encoded string, then breaks long lines if necessary:

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Answer 1

I have another entry:

function encode(data)
{
    var str = String.fromCharCode.apply(null,data);
    return btoa(str).replace(/.{76}(?=.)/g,'$&\n');
}

Minified, 88 characters:

function e(d){return btoa(String.fromCharCode.apply(d,d)).replace(/.{76}(?=.)/g,'$&\n')}

Or if you want trailing newlines, 85 characters:

function e(d){return btoa(String.fromCharCode.apply(d,d)).replace(/.{1,76}/g,'$&\n')}