function setNav(navlink) {
		var link = "nav_"+navlink;
		switch (navlink) {
			case "home":
				var firstBox = 1;
				var secondBox = 2;
				break;
			case "writing":
				var firstBox = 2;
				var secondBox = 3;
				break;
			case "yoga":
				var firstBox = 3;
				var secondBox = 4;
				break;
			case "photo":
				var firstBox = 4;
				var secondBox = 5;
				break;
			case "bio":
				var firstBox = 5;
				var secondBox = 6;
				break;	
			case "contact":
				var firstBox = 6;
				var secondBox = 7;
				break;

		}
		firstBox = "box_"+firstBox;
		secondBox = "box_"+secondBox;
		var linkToChange = document.getElementById(link);
		var box1 = document.getElementById(firstBox);
		var box2 = document.getElementById(secondBox);		
		if (linkToChange) linkToChange.src = 'images/nav_'+navlink+'_f2.gif';
		if (box1) box1.style.backgroundColor = "#336600";
		if (box2) box2.style.backgroundColor = "#336600";
}