Adding a separator between treenodes

[BrightSoul]

Hello,
I'm loading data into a treepanel from an external php file which produces the following output.

[{"text":"file1.txt","id":file1","leaf":true,"cls":"file"},
{"text":"file2.txt","id":file2","leaf":true,"cls":"file"},
{"text":"file3.txt","id":file3","leaf":true,"cls":"file"}]

What I want to do now is to add a separator between the second and the third node. I tried doing this:

[{"text":"file1.txt","id":file1","leaf":true,"cls":"file"},
{"text":"file2.txt","id":file2","leaf":true,"cls":"file"},
"-",
{"text":"file3.txt","id":file3","leaf":true,"cls":"file"}]

but (obviously) it's not working. How do I add an horizontal line (ie: a separtor) between those elements?

Thanks for your support.
Bye.

[evant]

I don't think this is possible without a reasonable amount of hacking the tree.

[BrightSoul]

can I at least customize the style of the second node so it has a "border-bottom:1px solid"? That would look like a separator.


Edit: Ok, I managed to do it. I just changed the cls for the second node, like this:

[{"text":"file1.txt","id":file1","leaf":true,"cls":"file"},
{"text":"file2.txt","id":file2","leaf":true,"cls":"fileseparator"},
{"text":"file3.txt","id":file3","leaf":true,"cls":"file"}]

and added this to my css code:

.fileseparator {border-bottom:1px solid black}

Sorry for the silly question, that was easy enough to solve by myself