function swap_image(obj,img)
	{
		obj.src = img.src;
	}
// image preloads

	aboutus_NORM=new Image()
	aboutus_NORM.src="images/buttons/about_us_NORM.gif"
	contactus_NORM=new Image()
	contactus_NORM.src="images/buttons/contact_us_NORM.gif"
	intandinf_NORM=new Image()
	intandinf_NORM.src="images/buttons/intandinf_NORM.gif"
	chaos_NORM=new Image()
	chaos_NORM.src="images/buttons/chaos_NORM.gif"
	newtrips_NORM=new Image()
	newtrips_NORM.src="images/buttons/newtrips_NORM.gif"
	pasttrips_NORM=new Image()
	pasttrips_NORM.src="images/buttons/pasttrips_NORM.gif"
	photos_NORM=new Image()
	photos_NORM.src="images/buttons/photos_NORM.gif"
	discussions_NORM=new Image()
	discussions_NORM.src="images/buttons/discussions_NORM.gif"
	center_NORM=new Image()
	center_NORM.src="images/center_logo_and_pics/02_0_center.jpg"

	aboutus_OVER=new Image()
	aboutus_OVER.src="images/buttons/about_us_OVER.gif"
	contactus_OVER=new Image()
	contactus_OVER.src="images/buttons/contact_us_OVER.gif"
	intandinf_OVER=new Image()
	intandinf_OVER.src="images/buttons/intandinf_OVER.gif"
	chaos_OVER=new Image()
	chaos_OVER.src="images/buttons/chaos_OVER.gif"
	newtrips_OVER=new Image()
	newtrips_OVER.src="images/buttons/newtrips_OVER.gif"
	pasttrips_OVER=new Image()
	pasttrips_OVER.src="images/buttons/pasttrips_OVER.gif"
	photos_OVER=new Image()
	photos_OVER.src="images/buttons/photos_OVER.gif"
	discussions_OVER=new Image()
	discussions_OVER.src="images/buttons/discussions_OVER.gif"

	center_ABOUTUS=new Image()
	center_ABOUTUS.src="images/center_logo_and_pics/02_aboutus_center.jpg"
	center_CONTACTUS=new Image()
	center_CONTACTUS.src="images/center_logo_and_pics/02_contactus_center.jpg"
	center_INTANDINF=new Image()
	center_INTANDINF.src="images/center_logo_and_pics/02_intandinf_center.jpg"
	center_CHAOS=new Image()
	center_CHAOS.src="images/center_logo_and_pics/02_chaos_center.jpg"
	center_NEWTRIPS=new Image()
	center_NEWTRIPS.src="images/center_logo_and_pics/02_newtrips_center.jpg"
	center_PASTTRIPS=new Image()
	center_PASTTRIPS.src="images/center_logo_and_pics/02_pasttrips_center.jpg"
	center_PHOTOS=new Image()
	center_PHOTOS.src="images/center_logo_and_pics/02_photos_center.jpg"
	center_DISCUSSIONS=new Image()
	center_DISCUSSIONS.src="images/center_logo_and_pics/02_discussions_center.jpg"