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dhtmlxTree is a cross-browser JavaScript tree menu that helps to create a full featured navigation system and put large amount of data in hierarchical order. Dynamical loading of items from XML stream gives a possibility to create trees with unlimited number of nodes. dhtmlxTree can load its content dynamically from server using Ajax or directly from on-page XML data-island. Powerful client-side API allows complete customization of a tree view with JavaScript. Extended drag-n-drop functionality greatly simplifies tree usage. Drop-as-sibling behavior makes it easy to reorder nodes in a tree view. This DHTML tree has checkbox system in order to use this component as a navigation bar with selection lists. Besides usual two-state checkboxes (checked item, unchecked item), there is a possibility to use three state checkboxes with "partly-checked" value (some sub-items are checked). JavaScript tree main features: - Multibrowser/Multiplatform support - XHTML compatible - Full controll with JavaScript API - Dynamic loading - XML support - Extended XML serialization - drag-&-drop (within one tree, between trees) - copy with drag-n-drop - drop-between/drop-inside - checkboxes (two/three states), disabled/hidden - customizable icons (with javascript or xml), icon size - user data for nodes - Async mode loading support - .NET custom server control - JSP custom tag - Macromedia Cold Fusion support - Sorting (a-z,z-a) - Event handlers for loading process - Extended event handlers for drag-n-drop dhtmlxTree is free for non-commercial use. Source code is available.