function swapem(iname, gname) {
	iname.src = gname.src;
}

if (document.images) {	
	prev_on = new Image;
	next_on = new Image;
		
	prev_off = new Image;
	next_off = new Image;
	
	prev_on.src = "images/btn_prev_on.gif";
	next_on.src = "images/btn_next_on.gif";
		
	prev_off.src = "images/btn_prev_off.gif";
	next_off.src = "images/btn_next_off.gif";
}