if (document.images) {
	var description_on = new Image(); 
	description_on.src = "images/description_on.jpg";
	var description_off = new Image(); 
	description_off.src = "images/description_off.jpg";
	
	var activities_on = new Image(); 
	activities_on.src = "images/activities_on.jpg";
	var activities_off = new Image(); 
	activities_off.src = "images/activities_off.jpg";
	
	var collaborators_on = new Image(); 
	collaborators_on.src = "images/collaborators_on.jpg";
	var collaborators_off = new Image(); 
	collaborators_off.src = "images/collaborators_off.jpg";
	
	var links_on = new Image(); 
	links_on.src = "images/links_on.jpg";
	var links_off = new Image(); 
	links_off.src = "images/links_off.jpg";
	
	var glossary_on = new Image(); 
	glossary_on.src = "images/glossary_on.jpg";
	var glossary_off = new Image(); 
	glossary_off.src = "images/glossary_off.jpg";
	
	var contact_on = new Image(); 
	contact_on.src = "images/contact_on.jpg";
	var contact_off = new Image(); 
	contact_off.src = "images/contact_off.jpg";
	
	var description2_on = new Image(); 
	description2_on.src = "images/description2_on.jpg";
	var description2_off = new Image(); 
	description2_off.src = "images/description2_off.jpg";
	
	var activities2_on = new Image(); 
	activities2_on.src = "images/activities2_on.jpg";
	var activities2_off = new Image(); 
	activities2_off.src = "images/activities2_off.jpg";
	
	var collaborators2_on = new Image(); 
	collaborators2_on.src = "images/collaborators2_on.jpg";
	var collaborators2_off = new Image(); 
	collaborators2_off.src = "images/collaborators2_off.jpg";
	
	var links2_on = new Image(); 
	links2_on.src = "images/links2_on.jpg";
	var links2_off = new Image(); 
	links2_off.src = "images/links2_off.jpg";
	
	var glossary2_on = new Image(); 
	glossary2_on.src = "images/glossary2_on.jpg";
	var glossary2_off = new Image(); 
	glossary2_off.src = "images/glossary2_off.jpg";
	
	var contact2_on = new Image(); 
	contact2_on.src = "images/contact2_on.jpg";
	var contact2_off = new Image(); 
	contact2_off.src = "images/contact2_off.jpg";
}


function act(imgName) {
	if (document.images) 
		document.images[imgName].src = eval(imgName + "_on.src");
}

function inact(imgName) {
	if (document.images)
		document.images[imgName].src = eval(imgName + "_off.src");
}