function overimg(name) {
	if (name != '') {
		img = document.images[name].src;
		id = img.substr((img.length-6),100);
		document.images[name].src = 'images/a_nav_' + id;
	}
}

function outimg(name) {
	if (name != '') {
		img = document.images[name].src;
		id = img.substr((img.length-6),100);
		document.images[name].src = 'images/nav_' + id;
	}
}

function overmaster(name) {
	overimg(name);
	
	for (i = 1; i < 20; i++) {
		x = name + i;
		if (document.images[x] != null) {
			overimg(x);
		} else {
			return;
		}
	}
}

function outmaster(name) {
	outimg(name);

	for (i = 1; i < 20; i++) {
		x = name + i;
		if (document.images[x] != null) {
			outimg(x);
		} else {
			return;
		}
	}
}

function switchimage(id) {
	document.images["headimg"].src = 'imagesvisual/' + id + '.jpg';
}

function openWin(url, name) {
	win = window.open(url, name, 'scrollbars=yes,resizable=yes,width=490,height=520');
	win.focus();
}