if (document.images) {
	conf1_off = new Image();
	conf1_off.src = "picts/bt_2001conf.gif";
	conf1_over = new Image();
	conf1_over.src = "picts/bt_2001conf_over.gif";  

	conf2_off = new Image();
	conf2_off.src = "picts/bt_2002conf.gif";
	conf2_over = new Image();
	conf2_over.src = "picts/bt_2002conf_over.gif";  
	  
	conf4_off = new Image();
	conf4_off.src = "picts/bt_2004conf.gif";
	conf4_over = new Image();
	conf4_over.src = "picts/bt_2004conf_over.gif";  
	
	conf5_off = new Image();
	conf5_off.src = "picts/bt_2005conf.gif";
	conf5_over = new Image();
	conf5_over.src = "picts/bt_2005conf_over.gif";  
	
	conf6_off = new Image();
	conf6_off.src = "picts/bt_2006conf.gif";
	conf6_over = new Image();
	conf6_over.src = "picts/bt_2006conf_over.gif";  

	conf3_off = new Image();
	conf3_off.src = "picts/bt_2003conf.gif";
	conf3_over = new Image();
	conf3_over.src = "picts/bt_2003conf_over.gif";  

	advisory_off = new Image();
	advisory_off.src = "picts/bt_advisory.gif";
	advisory_over = new Image();
	advisory_over.src = "picts/bt_advisory_over.gif";
	  
	biographies_off = new Image();
	biographies_off.src = "picts/bt_biographies.gif";
	biographies_over = new Image();
	biographies_over.src = "picts/bt_biographies_over.gif";  
	  
	contact_off = new Image();
	contact_off.src = "picts/bt_contact.gif";
	contact_over = new Image();
	contact_over.src = "picts/bt_contact_over.gif";  
	  
	oct2001panel_off = new Image();
	oct2001panel_off.src = "picts/bt_oct2001panel.gif";
	oct2001panel_over = new Image();
	oct2001panel_over.src = "picts/bt_oct2001panel_over.gif";  
	  
	partcomm_off = new Image();
	partcomm_off.src = "picts/bt_partcomm.gif";
	partcomm_over = new Image();
	partcomm_over.src = "picts/bt_partcomm_over.gif";  
	  
	press_off = new Image();
	press_off.src = "picts/bt_press.gif";
	press_over = new Image();
	press_over.src = "picts/bt_press_over.gif";  
	  
	sponsors_off = new Image();
	sponsors_off.src = "picts/bt_sponsors.gif";
	sponsors_over = new Image();
	sponsors_over.src = "picts/bt_sponsors_over.gif"; 
	  
	whatis_off = new Image();
	whatis_off.src = "picts/bt_whatis.gif";
	whatis_over = new Image();
	whatis_over.src = "picts/bt_whatis_over.gif";  
	  
	writings_off = new Image();
	writings_off.src = "picts/bt_writings.gif";
	writings_over = new Image();
	writings_over.src = "picts/bt_writings_over.gif";  

	travelinfo_off = new Image();
	travelinfo_off.src = "picts/bt_travelinfo.gif";
	travelinfo_over = new Image();
	travelinfo_over.src = "picts/bt_travelinfo_over.gif";  

	venue2005_off = new Image();
	venue2005_off.src = "picts/bt_venue2005.gif";
	venue2005_over = new Image();
	venue2005_over.src = "picts/bt_venue2005_over.gif";  

	venue2006_off = new Image();
	venue2006_off.src = "picts/bt_venue2006.gif";
	venue2006_over = new Image();
	venue2006_over.src = "picts/bt_venue2006_over.gif";

	
	venue2003_off = new Image();
	venue2003_off.src = "picts/bt_venue2003.gif";
	venue2003_over = new Image();
	venue2003_over.src = "picts/bt_venue2003_over.gif";  

	
	}
	
	function changeImages() {
	  if (document.images) {
	    for (var i=0; i<changeImages.arguments.length; i+=2) {
	      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
	    }
	  }
	}