function initBanners() {
	var banners = document.getElementById('banners')
	var a = banners.getElementsByTagName('A');
	for(var i=0; i<a.length; i++) {		
		if(i==0 || i==4 || i==3) {
			highlight(a[i]);
			a[i].onmouseover = unhighlight;
			a[i].onmouseout = highlight;
		} else {
			a[i].onmouseover = highlight;
			a[i].onmouseout = unhighlight;
		}		
	}
	
	function highlight(elem) {
		if(!elem || elem.nodeName != 'A') elem = this;
		if(elem.parentNode.nodeName == 'DIV') {			
			var div = elem.parentNode;
			if(div.style.backgroundImage.indexOf('-a.gif') == -1) {
				div.style.backgroundImage = div.style.backgroundImage.replace('.gif', '-a.gif');
			}
		} else {
			var img = elem.getElementsByTagName('IMG')[0];
			if(img.src.indexOf('-a.gif') == -1) {
				img.src = img.src.replace('.gif', '-a.gif');
			}
		}		
	}
	function unhighlight(elem) {
		if(!elem || elem.nodeName != 'A') elem = this;
		if(elem.parentNode.nodeName == 'DIV') {
			var div = elem.parentNode;
			div.style.backgroundImage = div.style.backgroundImage.replace('-a.gif', '.gif');
		} else {
			var img = elem.getElementsByTagName('IMG')[0];
			img.src = img.src.replace('-a.gif', '.gif');
		}
	}
}