function NE_onLoad() {
   i1 = new Image();
   i1.src = "graphics/home-buto.gif";
   i2 = new Image();
   i2.src = "graphics/services-buto.gif";
   i3 = new Image();
   i3.src = "graphics/team-buto.gif";
   i4 = new Image();
   i4.src = "graphics/project-buto.gif";
   i5 = new Image();
   i5.src = "graphics/contact-buto.gif";
   i6 = new Image();
   i6.src = "graphics/links-buto.gif";
}