if (document.images) {            // Active Images

            oneon = new Image();      
            oneon.src = "images/1over.gif";

            oneoff = new Image(); 
            oneoff.src = "images/1.gif";

            twoon = new Image();      
	    twoon.src = "images/2over.gif";

            twooff = new Image(); 
            twooff.src = "images/2.gif";

            threeon = new Image();      
	    threeon.src = "images/3over.gif";
	    
	    threeoff = new Image(); 
	    threeoff.src = "images/3.gif";
	    
            fouron = new Image();      
	    fouron.src = "images/4over.gif";
	    
	    fouroff = new Image(); 
	    fouroff.src = "images/4.gif";
	    
            fiveon = new Image();      
            fiveon.src = "images/5over.gif";

            fiveoff = new Image(); 
            fiveoff.src = "images/5.gif";
            
            sixon = new Image();      
            sixon.src = "images/6over.gif";
            
            sixoff = new Image();      
	    sixoff.src = "images/6.gif";
            
            sevenon = new Image();      
            sevenon.src = "images/7over.gif";
            
            sevenoff = new Image();      
	    sevenoff.src = "images/7.gif";
            
            eighton = new Image();      
            eighton.src = "images/8over.gif";
            
            eightoff = new Image();      
	    eightoff.src = "images/8.gif";

            nineon = new Image();      
            nineon.src = "images/9over.gif";
            
            nineoff = new Image();      
	    nineoff.src = "images/9.gif";
    

        }

// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}