function image_swap(name,state) {
	img_name = name + "_" + state;
	document.images[name].src = images_arr[img_name].src;
}

function nav_show(object_name) {
	topnav_name = object_name.substr(0,object_name.indexOf('_'));
	topnav_name = (topnav_name=='')?object_name:topnav_name;
	if (!nohide_arr[object_name]&&object_name.indexOf('separator')==-1) image_swap(object_name,'over');
	for (i in nav_pos) {
		name = nav_pos[i];
		if (!nohide_arr[name] && name.indexOf(topnav_name)!=-1 && name != object_name) image_swap(name,'act');
	}
	if (object_name.indexOf('separator')!=-1) image_swap(object_name,'act');
}
function nav_reset() {
	for (i in nav_pos) {
		name = nav_pos[i];
		if (!nohide_arr[name] && name!='' && name!='undefined') image_swap(name,'inact');
	}
}

function init_nav() {
	for (i in nohide_arr) {
		if (nohide_arr[i]) image_swap(i,'over');
	}
}