It was on one of the other forums that this reqiurement was put. It was required to collapse all treeview nodes on the client with javascript.
So, i wrote some script to accomplish the task and realizing that the script to Expand all nodes will not be  very different, i did a minor modification to get it working for the expand all case. Now with this script we can save a server trip for just expanding or collapsing all nodes. I have tested the script in IE7 & FF2.0 and it works fine in both. Below i give the script:
1)Expand all nodes
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function expandAll(treeViewId)     {          var treeView = document.getElementById(treeViewId);          var treeLinks = treeView.getElementsByTagName("a");      &nbs ...

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