var ar = [
           [ null,
             3,
             [ null, 4, null ]
           ],
           5,
           [
             [ null, 6, null ],
             7,
             null
           ]
         ];

document.writeln( "<p>Inorder traversal:<br>" )
Array.inorderTraversal( ar );
document.writeln( "</p>" );

Array.insertBST( ar, 1 );
Array.insertBST( ar, 8 );
document.writeln( "<p>Inorder traversal:<br>" )
Array.inorderTraversal( ar );
document.writeln( "</p>" );