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    nav_main_visitoro.src = "images/nav_main/visitoro.gif";
	
	nav_main_exhibitionso = new Image();
    nav_main_exhibitionso.src = "images/nav_main/exhibitionso.gif";
	
	nav_main_eventso = new Image();
    nav_main_eventso.src = "images/nav_main/eventso.gif";
	
	nav_main_outreacho = new Image();
    nav_main_outreacho.src = "images/nav_main/outreacho.gif";
	
	nav_main_educationo = new Image();
    nav_main_educationo.src = "images/nav_main/educationo.gif";
	
	nav_main_collectionso = new Image();
    nav_main_collectionso.src = "images/nav_main/collectionso.gif";
	
	nav_main_supporto = new Image();
    nav_main_supporto.src = "images/nav_main/supporto.gif";	


   /* Below images are for mouse-off. */
    nav_main_visitorx = new Image();
    nav_main_visitorx.src = "images/nav_main/visitorx.gif";

	nav_main_exhibitionsx = new Image();
    nav_main_exhibitionsx.src = "images/nav_main/exhibitionsx.gif";
	
	nav_main_eventsx = new Image();
    nav_main_eventsx.src = "images/nav_main/eventsx.gif";
	
	nav_main_outreachx = new Image();
    nav_main_outreachx.src = "images/nav_main/outreachx.gif";
	
	nav_main_educationx = new Image();
    nav_main_educationx.src = "images/nav_main/educationx.gif";
	
	nav_main_collectionsx = new Image();
    nav_main_collectionsx.src = "images/nav_main/collectionsx.gif";
	
	nav_main_supportx = new Image();
    nav_main_supportx.src = "images/nav_main/supportx.gif";
	

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  function imgOff(imgName) {
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//-->