CSS Styling TreeView

Hi: I am trying to specify css classes for the nodes in a ASP treeview. I want 
to indent each child node 100px from it's parent node. There may be several 
levels and the actual number of levels is unknown. I have used margin-left to 
set the node positions but if I indent a parent node say 100px and a childnode 
say 200px the first level is fine. If there are say parent nodes inside another 
parent node then the parent nodes are not offset relative to it's parent node 
if that makes sense. For example:
A structure:
Cars:
Makes:
Ford
Chevy
Trucks:
Ford
Chevy
would be ok since there is only 1 parent level and one child level under the 
parent levels.
The Cars and Trucks parents are offset 100px from the left of the TreeView 
container.
Cars:
Domestic:
makes:
Ford
Chevy
The 2 nested parent elements are both indented 100px where the nested Cars 
should be indented 200px.
Then the Ford and Chevy should be indented 300px.
How would I use css to accomplish something like this for a general TreeView 
where the number of nested parents is unknown? And, each nested parent node 
should be indented relative to it's parent node and the leaf node indentented 
after the final branch (parent) node.
the prior parent if neste
Rick USA

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