if (document.images ) {
	about_off= new Image(40,11);
	about_off.src='../images/nav-global-about.gif';
	about_active= new Image(40,11);
	about_active.src='../images/nav-global-about-act.gif';

	contact_off = new Image(50,10);
	contact_off.src='../images/nav-global-contact.gif';
	contact_active= new Image(50,10);
	contact_active.src='../images/nav-global-contact-act.gif';

	courses_off= new Image(126,15);
	courses_off.src='../images/nav-global-courses.gif';
	courses_active= new Image(126,15);
	courses_active.src='../images/nav-global-courses-act.gif';

	testimonials_off= new Image(84,12);
	testimonials_off.src='../images/nav-global-testimonials.gif';
	testimonials_active= new Image(84,12);
	testimonials_active.src='../images/nav-global-testimonials-act.gif';
	
	tutors_off= new Image(42,11);
	tutors_off.src='../images/nav-global-tutors.gif';
	tutors_active= new Image(42,1);
	tutors_active.src='../images/nav-global-tutors-act.gif';
}
function swap(img,swapImg) {
	if (document.images) {
		document[img].src= swapImg.src;
	}
}