if (document.images) {
	
	img1on = new Image();           // The onmouseover image
	img1on.src = "navigation/100.gif";  
	img2on = new Image();
	img2on.src = "navigation/200.gif";  
	img3on = new Image();
	img3on.src = "navigation/300.gif";
	img4on = new Image();
	img4on.src = "navigation/400.gif";
	img5on = new Image();
	img5on.src = "navigation/500.gif";
	img6on = new Image();
	img6on.src = "navigation/600.gif";
	img7on = new Image();
	img7on.src = "navigation/700.gif";
	img8on = new Image();
	img8on.src = "navigation/800.gif";
	img9on = new Image();
	img9on.src = "navigation/900.gif";
	img10on = new Image();
	img10on.src = "navigation/1000.gif";
	img11on = new Image();
	img11on.src = "navigation/1100.gif";
	img12on = new Image();
	img12on.src = "navigation/1200.gif";
	img1off = new Image();          // The normally seen image
	img1off.src = "navigation/1.gif"; 
	img2off = new Image();
	img2off.src = "navigation/2.gif"; 
	img3off = new Image();
	img3off.src = "navigation/3.gif";
	img4off = new Image();
	img4off.src = "navigation/4.gif";
	img5off = new Image();
	img5off.src = "navigation/5.gif";
	img6off = new Image();
	img6off.src = "navigation/6.gif";
	img7off = new Image();
	img7off.src = "navigation/7.gif";
	img8off = new Image();
	img8off.src = "navigation/8.gif";
	img9off = new Image();
	img9off.src = "navigation/9.gif";
	img10off = new Image();
	img10off.src = "navigation/10.gif";
	img11off = new Image();
	img11off.src = "navigation/11.gif";
	img12off = new Image();
	img12off.src = "navigation/12.gif";
	
  }				  //This function changes the image when over.
    function imgOn(imgName) {
            if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
            }
    }				   //This function changes the image back when off.
    function imgOff(imgName) {
            if (document.images) {
            document[imgName].src = eval(imgName + "off.src");        
            }
    }