/** Creates the rolloever effect on the home page **/

/* Preloads roll over images */
(new Image()).src = "images/aheast_over.jpg";
(new Image()).src = "images/ahwest_over.jpg";
(new Image()).src = "images/fostercare_over.jpg";
(new Image()).src = "images/iliving_over.jpg";

/* globals */
var directory = 'images/';
var images    = 'img_';
var divisions = 'div_';
var active    = 'logo';

/* reveals a rollover */
function swap(next) {
	var img_next   = document.getElementById(images + next);
	var div_mext   = document.getElementById(divisions + next);
	var img_active = document.getElementById(images + active);
	var div_active = document.getElementById(divisions + active);
	
	/* restore the orginial image and hide its text */
	img_active.src = directory + active + '.jpg';
	div_active.style.display = 'none';
	
	/* if the image isn't home, swap it */
	if(next != 'logo')
		img_next.src = directory + next + '_over.jpg';
	div_mext.style.display = 'block';
	
	/* set the active name */
	active = next;
}