forループ文で２次元配列の要素をリスト表示

<script type="text/javascript">
var $arr = new Array(
    [ "要素１－１", "要素１－２", "要素１－３" ],
    [ "要素２－１", "要素２－２", "要素２－３" ],
    [ "要素３－１", "要素３－２", "要素３－３" ],
    [ "要素４－１", "要素４－２", "要素４－３" ],
    [ "要素５－１", "要素５－２", "要素５－３" ]
);
document.write( '<ol>\n' );
for ( var $counterVarA = 0; $counterVarA < $arr.length; $counterVarA++ ) {
    document.write( '<li>' );
    document.write( '<ol>\n' );
    for ( var $counterVarB = 0; $counterVarB < $arr[$counterVarA].length; $counterVarB++ ) {
        document.write( '<li>' );
        document.write( $arr[$counterVarA][$counterVarB] );
        document.write( '</li>\n' );
    }
    document.write( '</ol>' );
    document.write( '</li>' );
}
document.write( '</ol>' );
</script>