function custom_init() {
	if (document.getElementById('tab_backt01') && document.getElementById('nom_service')) {
		backhtm = '<span class="group_container" id="nav_nom_backt"><h3><a onclick="panel_predef(\'tracking_panel\', \'tab_backt01\')">';
		backhtm+= document.getElementById('tab_backt01').getElementsByTagName('span')[1].innerHTML;
		backhtm+= '</a></h3><br></span><span class="grp_spacing grp_between"></span>';
		insertHTML(document.getElementById('nom_service'),backhtm,document.getElementById('nom_service').getElementsByTagName('span')[1]);
	}
}