image1on = new Image(); 
image1on.src= "/common/images/shared/navigation/left/elcentro.gif";
image1off = new Image(); 
image1off.src= "/common/images/shared/navigation/left/elcentro-over.gif";
image2on = new Image(); 
image2on.src= "/common/images/shared/navigation/left/lethbridge.gif";
image2off = new Image(); 
image2off.src= "/common/images/shared/navigation/left/lethbridge-over.gif";
image3on = new Image(); 
image3on.src= "/common/images/shared/navigation/left/cremona.gif";
image3off = new Image(); 
image3off.src= "/common/images/shared/navigation/left/cremona-over.gif";