var nav = [
["Cranial", "","_self",[["InstaTrak", "/usen/xr/surgery/products/instatrak3500.html", "N", "_self"],["Image Guided Surgery", "/usen/xr/surgery/products/navigation.html", "N", "_self"],["Education", "/usen/xr/surgery/products/nav_edu.html", "N", "_self"],["Contact Us", "http://products.adtrack.com/00392/contactus.asp", "N", "_self"]]]
];
var navbox =[
];