function navRoll(obj) {
	var i = 0;
	var btn = '';
	for(i=0;i<6;i++) {
		var btn = 'nav1-link'+i;
		var photo = 'nav1-photo'+i;
		if (obj < 1) {
			if (document.getElementById(photo)) document.getElementById(photo).style.backgroundPosition='0 0';
			if (document.getElementById(btn)) document.getElementById(btn).style.backgroundPosition='0 -50px';
		} else {
			if (i != obj) {
				if (document.getElementById(btn)) document.getElementById(btn).style.backgroundPosition='0 0';
				if (document.getElementById(photo)) document.getElementById(photo).style.backgroundPosition='0 -101px';
			} else {
				if (document.getElementById(btn)) document.getElementById(btn).style.backgroundPosition='0 -50px';
				if (document.getElementById(photo)) document.getElementById(photo).style.backgroundPosition='0 0';
			}
		}
	}
}

function navRollOut(obj) {
	var i = 0;
	var btn = '';
	for(i=0;i<6;i++) {
		var btn = 'nav1-link'+i;
		var photo = 'nav1-photo'+i;
		if (i != obj) {
			if (document.getElementById(btn)) document.getElementById(btn).style.backgroundPosition='0 -50px';
			if (document.getElementById(photo)) document.getElementById(photo).style.backgroundPosition='0 0';
		} else {
			if (document.getElementById(btn)) document.getElementById(btn).style.backgroundPosition='0 -50px';
			if (document.getElementById(photo)) document.getElementById(photo).style.backgroundPosition='0 0';
		}
	}
}