function switchMenu(obj, img) 
{
	var el = document.getElementById(obj);
	var myImage = document.getElementById(img);
	
	if ( el.style.display != "none" ) 
	{
		el.style.display = 'none';
		myImage.src = './images/PlusIcon.gif'; 
	}
	else 
	{
		el.style.display = '';
		myImage.src = './images/MinusIcon.gif'; 
	}
}