if (document.images) {       
img1on = new Image();		
img1on.src ="../img/10-1up.jpg"; 
img1off = new Image();		  	
img1off.src = "../img/10-1.jpg"; 
img2on = new Image();		
img2on.src ="../img/11up-1.jpg"; 
img2off = new Image();		  	
img2off.src = "../img/11-1.jpg"; 
img3on = new Image();		
img3on.src ="../img/12up-1.jpg"; 
img3off = new Image();		  	
img3off.src = "../img/12-1.jpg"; 
}
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"); }}