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img1on.src="images/nav/btn1on.jpg";
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img3on.src="images/nav/btn3on.jpg";
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img4on.src="images/nav/btn4on.jpg";
img5on=new Image();
img5on.src="images/nav/btn5on.jpg";
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img6on.src="images/nav/btn6on.jpg";

img1off=new Image();
img1off.src="images/nav/btn1off.jpg";
img2off=new Image();
img2off.src="images/nav/btn2off.jpg";
img3off=new Image();
img3off.src="images/nav/btn3off.jpg";
img4off=new Image();
img4off.src="images/nav/btn4off.jpg";
img5off=new Image();
img5off.src="images/nav/btn5off.jpg";
img6off=new Image();
img6off.src="images/nav/btn6off.jpg";
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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"); } }
// -->