JavaScript typed array on iOS 4.2.1

typed.js

<script type="text/javascript" charset="utf-8">
    var buffer = new ArrayBuffer( 16 );
    var int32View = new Int32Array( buffer );
    for ( var i = 0; i < int32View.length; i++ ) {
        int32View[i] = i * 2;  
    }
    alert( int32View[ 3 ] ); // Alerts 6 in 4.2.1
</script>