if (document.images) {

	  var nav1n = new Image()
	  nav1n.src = "images/abouthome_up.gif"
	  var nav1a = new Image()
	  nav1a.src = "images/abouthome_over.gif"
	  
	   var nav2n = new Image()
	  nav2n.src = "images/physhome_up.gif"
	  var nav2a = new Image()
	  nav2a.src = "images/physhome_over.gif"
	  
	   var nav3n = new Image()
	  nav3n.src = "images/staffhome_up.gif"
	  var nav3a = new Image()
	  nav3a.src = "images/staffhome_over.gif"
	  
	   var nav4n = new Image()
	  nav4n.src = "images/apptshome_up.gif"
	  var nav4a = new Image()
	  nav4a.src = "images/apptshome_over.gif"
	  
	   var nav5n = new Image()
	  nav5n.src = "images/resourcehome_up.gif"
	  var nav5a = new Image()
	  nav5a.src = "images/resourcehome_over.gif"
	 
	  var nav6n = new Image()
	  nav6n.src = "images/contacthome_up.gif"
	  var nav6a = new Image()
	  nav6a.src = "images/contacthome_over.gif"
	  
	  var nav7n = new Image()
	  nav7n.src = "images/home2_up.gif"
	  var nav7a = new Image()
	  nav7a.src = "images/home2_over.gif"
	  
	  var nav8n = new Image()
	  nav8n.src = "images/about2_up.gif"
	  var nav8a = new Image()
	  nav8a.src = "images/about2_over.gif"
	  
	  var nav9n = new Image()
	  nav9n.src = "images/phys2_up.gif"
	  var nav9a = new Image()
	  nav9a.src = "images/phys2_over.gif"
	  
	  var nav10n = new Image()
	  nav10n.src = "images/staff2_up.gif"
	  var nav10a = new Image()
	  nav10a.src = "images/staff2_over.gif"
	  
	   var nav11n = new Image()
	  nav11n.src = "images/appts2_up.gif"
	  var nav11a = new Image()
	  nav11a.src = "images/appts2_over.gif"
	  
	   var nav12n = new Image()
	  nav12n.src = "images/resource2_up.gif"
	  var nav12a = new Image()
	  nav12a.src = "images/resource2_over.gif"
	  
	   var nav13n = new Image()
	  nav13n.src = "images/contact2_up.gif"
	  var nav13a = new Image()
	  nav13a.src = "images/contact2_over.gif"
	  
	}

	function act(imgName) {
	  if (document.images) 
		document[imgName].src = eval(imgName + 'a.src')
	}

	function inact(imgName) {

	  if (document.images)
	  document[imgName].src = eval(imgName + 'n.src')
	}

	// -->