production1on = new Image();                    
production1on.src = "images/production1_on.gif";
production1off = new Image();
production1off.src = "images/production1_off.gif";

production2on = new Image();                    
production2on.src = "images/production2_on.gif";
production2off = new Image();
production2off.src = "images/production2_off.gif";

production3on = new Image();                    
production3on.src = "images/production3_on.gif";
production3off = new Image();
production3off.src = "images/production3_off.gif";

production4on = new Image();                    
production4on.src = "images/production4_on.gif";
production4off = new Image();
production4off.src = "images/production4_off.gif";

director1on = new Image();                    
director1on.src = "images/director1_on.gif";
director1off = new Image();
director1off.src = "images/director1_off.gif";

director2on = new Image();                    
director2on.src = "images/director2_on.gif";
director2off = new Image();
director2off.src = "images/director2_off.gif";

director3on = new Image();                    
director3on.src = "images/director3_on.gif";
director3off = new Image();
director3off.src = "images/director3_off.gif";

director4on = new Image();                    
director4on.src = "images/director4_on.gif";
director4off = new Image();
director4off.src = "images/director4_off.gif";

copyon = new Image();                    
copyon.src = "images/copy_on.gif";
copyoff = new Image();
copyoff.src = "images/copy_off.gif";

// On function
function imgAct(imgName) {
    document[imgName].src = eval(imgName + "on.src");
}

// Off function
function imgInact(imgName) {
    document[imgName].src = eval(imgName + "off.src");
}