Setting path in tree

Tree supports representation of a path between two nodes: a parent and a child.
Path can be set in xml or added by the script. Try to select any two radio buttons in tree and then press "set path" button.

 
    tree.addPath(start,end,{color:"blue", width:3},"new");
    tree.deleteAllPaths();
    
=============================XML=============================
<?xml version='1.0' encoding='iso-8859-1'?>
<tree id="0">
<item text="Books" id="books" ...>
    <pathstart id="path1" color="red" width="3" mode="dashed"/>
    <item text="Mystery &amp; Thrillers" id="mystery" ...>
    ...
         <item path_end="path1" text="Digital Fortress" id="db_3" ...>
                <pathend id="path1" />
         </item>
    ...
</item>
<tree>