Can i have one more level on Tree?

Hi All,
Pls let me know if i can have one more level on Tree. In the example if i change according like this, then it shows an empty page.

var treeView = {0:[1, 2, 3, 4], 1:[5], 2:[7], 3:[8], 4:[9],5[6]};

Yes, sure - you just have syntax error 5[6] (should be 5:[6]).

Frankly I only see the possibility of one sublevel to the tree by the documentation or your previous answer. Here's what I believe Vishanti was trying to demonstrate.

var treeView = {
0:[1, 2, 3, 4],
1:[5],
2:[7],
3:[8],
4:[
9:[
1, 2, 3
]
]

Would this work to create a sub-sublevel for main level 4, subitem 9?