/* 
  ------------------------------------
  Nav Rollovers
  ------------------------------------
*/


    if (document.images)         {
       

        nav1on = new Image();
        nav1on.src = "images/nav/exhibit_history_on.gif";
        nav1off = new Image();
        nav1off.src = "images/nav/exhibit_history_off.gif";


        nav2on = new Image();
        nav2on.src = "images/nav/proj_pubs_on.gif";
        nav2off = new Image();
        nav2off.src = "images/nav/proj_pubs_off.gif";


        nav3on = new Image();
        nav3on.src = "images/nav/contact_on.gif";
        nav3off = new Image();
        nav3off.src = "images/nav/contact_off.gif";


        
    }
        
function img_act(imgName) {
        if (document.images) {
	        document [imgName].src = eval(imgName + "on.src");;
        }
}

function img_inact(imgName) {
        if (document.images) {
	        document [imgName].src = eval(imgName + "off.src");;
        }
}