UnicodeEncoding encoding = new UnicodeEncoding();
byte[] bytes = encoding.GetBytes(AnyString);

var str = "Hello";
var bytes = [];

for (var i = 0; i < str.length; ++i)
{
    bytes.push(str.charCodeAt(i));
}

alert(bytes); // 72,0,101,0,108,0,108,0,111,0