function toggleClamShellMenu(objectID,imagesID) {
	var object = document.getElementById(objectID);
	var images = document.getElementById(imagesID);
	if (object.style.display =='block')  {object.style.display='none';
	images.src= '../resources/images/interface/img_arrow.gif';}
	else {object.style.display='block';
	images.src= '../resources/images/interface/img_arrow_down.gif';}
	return;
}