// cache rollover images for main nav
preload1 = new Image()
preload1.src = "images/nav_home_on.gif"
preload1 = new Image()
preload1.src = "images/nav_bio_on.gif"
preload1 = new Image()
preload1.src = "images/nav_clients_on.gif"
preload1 = new Image()
preload1.src = "images/nav_services_on.gif"
preload1 = new Image()
preload1.src = "images/nav_case_on.gif"
preload1 = new Image()
preload1.src = "images/nav_contact_on.gif"
	
// toggler for rollovers
function swap(which){
	pic = document.images[which]
	if (pic.src.indexOf("_off")>0){
		state = "_on.gif"
	} else {
		state = "_off.gif"
	}
	pic.src = "images/" + which + state
}