if (document.images) {
	tlbrImLoad = new Array (
		"courselist",
		"treeview",
		"back",
		"forward",
		"refresh",
		"exit",
		"personal",
		"search",
		"courseprogress",
		"forum",
		"chat",
		"tools",
		"evaluation",
		"roadmap",
		"help",
		"goadmin",
		"loading");
	tlbrImList_on = new Array();
	tlbrImList_off = new Array();
	tlbrImList_clicked = new Array();
	for (counter in tlbrImLoad) {
		tlbrImList_on[counter] = new Image();
		tlbrImList_off[counter] = new Image();
	}
	tlbrImLoad = new Array (
		"treeview",
		"back",
		"forward",
		"search",
		"evaluation",
		"roadmap");
	tlbrImList_disabled = new Array();
	for (counter in tlbrImLoad) {
		tlbrImList_disabled[counter] = new Image();
	}
	if (document.layers) {
		tlbrImLoad = new Array (
			"treeview",
			"roadmap");
		tlbrImList_selected = new Array();
		for (counter in tlbrImLoad) {
			tlbrImList_selected[counter] = new Image();
		}
	}
}