if (document.images) {
	  		img0on = new Image();          
            img0on.src =  "images/homebutton2.png";
            img1on = new Image();          
            img1on.src =  "images/execbutton2.png";   
            img2on = new Image();          
            img2on.src =  "images/zonesbutton2.png";     		
            img3on = new Image();          
            img3on.src =  "images/sitemapbutton2.png";	
            img4on = new Image();          
            img4on.src =  "images/exhibitbutton2.png";   
            img5on = new Image();          
            img5on.src =  "images/jobbutton2.png"; 
			img6on = new Image();          
            img6on.src =  "images/listingbutton2.png";   
            img7on = new Image();          
            img7on.src =  "images/faqbutton2.png";     		
            img8on = new Image();          
            img8on.src =  "images/confbutton2.png";	
            img9on = new Image();          
            img9on.src =  "images/certbutton2.png";   
            img10on = new Image();          
            img10on.src =  "images/bursarybutton2.png"; 
			img11on = new Image();          
            img11on.src =  "images/whobutton2.png"; 
			img12on = new Image();          
            img12on.src =  "images/conted2.png";
			img13on = new Image();          
            img13on.src =  "images/memberbutton2.png"; 
			img14on = new Image();          
            img14on.src =  "images/librarybutton2.png";
			img15on = new Image();          
            img15on.src =  "images/messagebutton2.png"; 
            // Active Images (rollover)
			  
	        img0off = new Image();          
            img0off.src =  "images/homebutton1.png";
            img1off = new Image();          
            img1off.src =  "images/execbutton1.png";   
            img2off = new Image();          
            img2off.src =  "images/zonesbutton1.png";     		
            img3off = new Image();          
            img3off.src =  "images/sitemapbutton1.png";	
            img4off = new Image();          
            img4off.src =  "images/exhibitbutton1.png";   
            img5off = new Image();          
            img5off.src =  "images/jobbutton1.png"; 
			img6off = new Image();          
            img6off.src =  "images/listingbutton1.png";   
            img7off = new Image();          
            img7off.src =  "images/faqbutton1.png";     		
            img8off = new Image();          
            img8off.src =  "images/confbutton1.png";	
            img9off = new Image();          
            img9off.src =  "images/certbutton1.png";   
            img10off = new Image();          
            img10off.src =  "images/bursarybutton1.png"; 
			img11off = new Image();          
            img11off.src =  "images/whobutton1.png"; 
			img12off = new Image();          
            img12off.src =  "images/conted1.png"; 
			img13off = new Image();          
            img13off.src =  "images/memberbutton1.png";
			img14off = new Image();          
            img14off.src =  "images/librarybutton1.png";
			img15off = new Image();          
            img15off.src =  "images/messagebutton1.png";
			// INactive Images
			
			 }

// Function to 'activate' images.
function imgOn(number) {
        if (document.images) {
            document["img" + number].src = eval("img" + number + "on.src");
            }
}
// Function to 'deactivate' images.
function imgOff(number) {
        if (document.images) {
            document["img" + number].src = eval("img" + number + "off.src");
           }
}
// -->