1 http://www.bernardopadua.com/nestedSortables/test/nested_sortable/
2 http://www.dhtmlgoodies.com/index.html?whichScript=drag-drop-folder-tree
3 http://extjs.com/products/extjs/
4 http://extjs.com/deploy/dev/examples/tree/reorder.html
5 http://extjs.com/deploy/dev/examples/tree/two-trees.html
6 http://www.telerik.com/community/forums/thread/b311D-gbcch.aspx
7 http://www.codeproject.com/KB/tree/A_better_TreevIew_control.aspx
8 http://www.codeproject.com/KB/asp/asptreeview.aspx