if (document.images) {
               img1on = new Image();           // Active images
               img1on.src = "ButtonEmailLR.gif";  
               img2on = new Image();
               img2on.src = "ButtonSendFriendLR.gif";
			   img3on = new Image();
               img3on.src = "ButtonToTopBlueUp1.gif";
			   img4on = new Image();
               img4on.src = "ButtonToTopBlueUp2.gif";  
			   img5on = new Image();
               img5on.src = "ButtonToTopBlueUp3.gif";  
			   img6on = new Image();
               img6on.src = "ButtonToTopBlueUp4.gif";  
			   img7on = new Image();
               img7on.src = "ButtonToTopBlueUp5.gif";  
			   img8on = new Image();
               img8on.src = "ButtonToTopBlueUp6.gif";  
			   img9on = new Image();
               img9on.src = "ButtonToTopBlueUp7.gif";  
			   img10on = new Image();
               img10on.src = "ButtonToTopBlueUp8.gif";  
			   img11on = new Image();
               img11on.src = "ButtonToTopBlueUp9.gif";  
			   img12on = new Image();
               img12on.src = "ButtonToTopBlueUp10.gif";  
			   img13on = new Image();
               img13on.src = "ButtonToTopBlueUp11.gif";  
			   img14on = new Image();
               img14on.src = "ButtonToTopBlueUp12.gif";  
			   img15on = new Image();
               img15on.src = "ButtonToTopBlueUp13.gif";  
			   img16on = new Image();
               img16on.src = "ButtonToTopBlueUp14.gif";  
			   img17on = new Image();
               img17on.src = "ButtonToTopBlueUp15.gif";  
			   img18on = new Image();
               img18on.src = "ButtonToTopBlueUp0.gif";
			   img19on = new Image();
               img19on.src = "ButtonLengthConversionLR.gif"; 
			   img1off = new Image();          // Inactive images
               img1off.src = "ButtonEmail.gif"; 
               img2off = new Image();
               img2off.src = "ButtonSendFriend.gif";
			   img3off = new Image();
               img3off.src = "ButtonToTopBlue1.gif";
			   img4off = new Image();
               img4off.src = "ButtonToTopBlue2.gif";
			   img5off = new Image();
               img5off.src = "ButtonToTopBlue3.gif";
			   img6off = new Image();
               img6off.src = "ButtonToTopBlue4.gif";
			   img7off = new Image();
               img7off.src = "ButtonToTopBlue5.gif";
			   img8off = new Image();
               img8off.src = "ButtonToTopBlue6.gif";
			   img9off = new Image();
               img9off.src = "ButtonToTopBlue7.gif";
			   img10off = new Image();
               img10off.src = "ButtonToTopBlue8.gif";
			   img11off = new Image();
               img11off.src = "ButtonToTopBlue9.gif";
			   img12off = new Image();
               img12off.src = "ButtonToTopBlue10.gif";
			   img13off = new Image();
               img13off.src = "ButtonToTopBlue11.gif";
			   img14off = new Image();
               img14off.src = "ButtonToTopBlue12.gif";
			   img15off = new Image();
               img15off.src = "ButtonToTopBlue13.gif";
			   img16off = new Image();
               img16off.src = "ButtonToTopBlue14.gif";
			   img17off = new Image();
               img17off.src = "ButtonToTopBlue15.gif";
			   img18off = new Image();
               img18off.src = "ButtonToTopBlue0.gif";
			   img19off = new Image();
               img19off.src = "ButtonLengthConversion.gif";
		   }
           function imgOn(imgName) {
                   if (document.images) {
                       document[imgName].src = eval(imgName + "on.src");
                   }
           }
           function imgOff(imgName) {
                   if (document.images) {
                       document[imgName].src = eval(imgName + "off.src");        
                   }
           }