function tocItem (name) {
		this.on = new Image();
		this.on.src =  "dfig/" + name + "aan.gif"
		this.off = new Image();
		this.off.src = "dfig/" + name + "uit.gif"
	}
	function toc_new (name) {
		tocItem[name] = new tocItem(name);
	}
	function img_act (imgName) {
    	if (document.images) document[imgName].src = tocItem[imgName].on.src;
	}
	function img_inact (imgName) {
    	if (document.images) document [imgName].src = tocItem[imgName].off.src;
	}
	function load_toc () {

                toc_new('freedown'); 			
	} 
	if (document.images !=null) load_toc ();