var tree_tpl = {
'target'  : '_blank',	// name of the frame links will be opened in
'icon_e'  : 'images/empty.gif', // empty image
'icon_l'  : 'images/line.gif',  // vertical line
'icon_32' : 'images/base.gif',   // root leaf icon normal
'icon_36' : 'images/base.gif',   // root leaf icon selected
'icon_48' : 'images/base.gif',   // root icon normal
'icon_52' : 'images/base.gif',   // root icon selected
'icon_56' : 'images/base.gif',   // root icon opened
'icon_60' : 'images/base.gif',   // root icon selected
'icon_16' : 'images/folder.gif', // node icon normal
'icon_20' : 'images/folderopen.gif', // node icon selected
'icon_24' : 'images/folderopen.gif', // node icon opened
'icon_28' : 'images/folderopen.gif', // node icon selected opened
'icon_0'  : 'images/page.gif', // leaf icon normal
'icon_4'  : 'images/page.gif', // leaf icon selected
'icon_2'  : 'images/joinbottom.gif', // junction for leaf
'icon_3'  : 'images/join.gif',       // junction for last leaf
'icon_18' : 'images/plusbottom.gif', // junction for closed node
'icon_19' : 'images/plus.gif',       // junctioin for last closed node
'icon_26' : 'images/minusbottom.gif',// junction for opened node
'icon_27' : 'images/minus.gif'       // junctioin for last opended node
};