if (document.images) {
     button1 = new Image
     button2 = new Image
     button3 = new Image
     button4 = new Image
     button5 = new Image
     button6 = new Image
     button7 = new Image
     button8 = new Image
     button9 = new Image
     button10 = new Image
     button11 = new Image
     button12 = new Image
     button13 = new Image
     button14 = new Image
     button15 = new Image
     button16 = new Image
     button17 = new Image
     button18 = new Image
     button19 = new Image
     button20 = new Image
     button21 = new Image
     button22 = new Image
     button23 = new Image
     button24 = new Image
     button25 = new Image
     button26 = new Image
     button27 = new Image
     button28 = new Image
     button29 = new Image
     button30 = new Image
	 button31 = new Image
     button32 = new Image
     button33 = new Image
     button34 = new Image
	 button35 = new Image
     button36 = new Image
     button37 = new Image
     button38 = new Image
     button39 = new Image
     button40 = new Image
     button41 = new Image
     button42 = new Image
     button43 = new Image
     button44 = new Image
     button45 = new Image
     button46 = new Image
	 button47 = new Image
     button48 = new Image
	 button49 = new Image
     button50 = new Image
	 button51 = new Image
     button52 = new Image

	 
	 
     button95 = new Image
     button96 = new Image
     button97 = new Image
     button98 = new Image
	 
	 
	
	 button1.src = '../graphics/arts_topnav.gif'
     button2.src = '../graphics/arts_topnavjs.gif'
	
	 button3.src = '../graphics/pub_topnav.gif'
     button4.src = '../graphics/pub_topnavjs.gif'
	
	 button5.src = '../graphics/pres_topnav.gif'
     button6.src = '../graphics/pres_topnavjs.gif'
	 
	 button7.src = '../graphics/heritage.gif'
     button8.src = '../graphics/heritage_js.gif'
	 
 	 button9.src = '../graphics/updates_nav.gif'
     button10.src = '../graphics/updates_navjs.jpg'
	 
	 button11.src = '../graphics/funding_nav.gif'
     button12.src = '../graphics/funding_navjs.jpg'
	 
	 button13.src = '../graphics/resources_nav.gif'
     button14.src = '../graphics/resources_navjs.jpg'
	 
	 button15.src = '../graphics/partners_nav.gif'
     button16.src = '../graphics/partners_navjs.jpg'
	 
	 button17.src = '../graphics/publications.jpg'
     button18.src = '../graphics/publications_js.gif'
	 
	 button19.src = '../graphics/news_tab.jpg'
     button20.src = '../graphics/news_tabjs.gif'
	 
	 button21.src = '../graphics/education.jpg'
     button22.src = '../graphics/education_js.gif'
	 
	 button23.src = '../graphics/facilities.jpg'
     button24.src = '../graphics/facilities_js.gif'
	 
	 button25.src = '../graphics/projects.jpg'
     button26.src = '../graphics/projects_js.gif'
	 
	 button27.src = '../graphics/sustained.jpg'
     button28.src = '../graphics/sustained_js.gif'
	 
	 button29.src = '../graphics/workshops.jpg'
     button30.src = '../graphics/workshops_js.gif'
	 
	 button31.src = '../graphics/technical.jpg'
     button32.src = '../graphics/technical_js.gif'
	 
	 button33.src = '../graphics/historical.jpg'
     button34.src = '../graphics/historical_js.gif'
	 
	 button35.src = '../graphics/about.jpg'
     button36.src = '../graphics/about_js.gif'
	 
	 button37.src = '../graphics/contact.jpg'
     button38.src = '../graphics/contact_js.gif'
	 
	 button39.src = '../graphics/advisory.jpg'
     button40.src = '../graphics/advisory_js.gif'
	 
	 button41.src = '../graphics/projects_nav.jpg'
     button42.src = '../graphics/projects_navjs.jpg'
	 
	 button43.src = '../graphics/facilities_homenav.jpg'
     button44.src = '../graphics/facilities_homenav_js.gif'
	 
	 button45.src = '../graphics/sustained_home.gif'
     button46.src = '../graphics/sustained_homejs.gif'	 
	 
	 button47.src = '../graphics/education.jpg'
     button48.src = '../graphics/education_js.gif'
	 
	 button49.src = '../graphics/collections.jpg'
     button50.src = '../graphics/collections_js.gif'

	 button51.src = '../graphics/onsite.gif'
     button52.src = '../graphics/onsite_js.gif'

	 
	 
	 button95.src = '../graphics/icon_about.gif'
     button96.src = '../graphics/icon_about_js.gif'
	 
	 button97.src = '../graphics/icon_contact.gif'
     button98.src = '../graphics/icon_contact_js.gif'
	 }