function active (base) {

	document.getElementById(base).src= "menu_as_image/" + base + "_active.gif";
	
}

function rollover (base, isSelectedItem) {
	

	state = "inactive"; // most of menus are inactive
	
	if (isSelectedItem == 'true') {
		// an image file name was given, take the given name
		state = "active";
	}
	

	document.getElementById(base).src= "menu_as_image/" + base + "_" + state + ".gif";
		
}