How to convert from Hex to ASCII in JavaScript?

by 
function hex2a(hexx) {
    var hex = hexx.toString();//force conversion
    var str="";
    for (var i = 0; i < hex.length; i += 2)
        str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
    return str;
}
hex2a('32343630'); // returns '2460'

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