var idnav_tpl = {
	'icon_e'  : 'images/idnav/empty.gif', // empty image
	'icon_l'  : 'images/idnav/line.gif',  // vertical line
	
	'icon_48' : 'images/idnav/spacer.gif',   // root icon normal
	'icon_52' : 'images/idnav/spacer.gif',   // root icon selected
	'icon_56' : 'images/idnav/spacer.gif',   // root icon opened
	'icon_60' : 'images/idnav/spacer.gif',   // root icon selected
	
	'icon_16' : 'images/idnav/spacer.gif', // node icon normal
	'icon_20' : 'images/idnav/spacer.gif', // node icon selected
	'icon_24' : 'images/idnav/spacer.gif', // node icon opened
	'icon_28' : 'images/idnav/spacer.gif', // node icon selected opened

	'icon_0'  : 'images/idnav/spacer.gif', // leaf icon normal
	'icon_4'  : 'images/idnav/spacer.gif', // leaf icon selected
	'icon_8'  : 'images/idnav/spacer.gif', // leaf icon opened
	'icon_12' : 'images/idnav/spacer.gif', // leaf icon selected
	
	'icon_2'  : 'images/idnav/join.gif', // junction for leaf
	'icon_3'  : 'images/idnav/join_end.gif', // junction for last leaf
	'icon_18' : 'images/idnav/plus.gif', // junction for closed node
	'icon_19' : 'images/idnav/plus_end.gif', // junctioin for last closed node
	'icon_26' : 'images/idnav/minus.gif',// junction for opened node
	'icon_27' : 'images/idnav/minus_end.gif', // junctioin for last opended node
	'onItemSelect' : 'onItemSelectHandler'
};