img1on = new Image();
img1on.src = "_images/_buttons/button01Roll.gif";

img1off = new Image();
img1off.src = "_images/_buttons/button01.gif";

img2on = new Image();
img2on.src = "_images/_buttons/button02Roll.gif";

img2off = new Image();
img2off.src = "_images/_buttons/button02.gif";

img3on = new Image();
img3on.src = "_images/_buttons/button03Roll.gif";

img3off = new Image();
img3off.src = "_images/_buttons/button03.gif";

img4on = new Image();
img4on.src = "_images/_buttons/button04Roll.gif";

img4off = new Image();
img4off.src = "_images/_buttons/button04.gif";

img5on = new Image();
img5on.src = "_images/_buttons/button05Roll.gif";

img5off = new Image();
img5off.src = "_images/_buttons/button05.gif";

img6on = new Image();
img6on.src = "_images/_buttons/button06Roll.gif";

img6off = new Image();
img6off.src = "_images/_buttons/button06.gif";

img7on = new Image();
img7on.src = "_images/_buttons/button07Roll.gif";

img7off = new Image();
img7off.src = "_images/_buttons/button07.gif";

img8on = new Image();
img8on.src = "_images/_buttons/button08Roll.gif";

img8off = new Image();
img8off.src = "_images/_buttons/button08.gif";

img9on = new Image();
img9on.src = "_images/_buttons/button09Roll.gif";

img9off = new Image();
img9off.src = "_images/_buttons/button09.gif";

img10on = new Image();
img10on.src = "_images/_buttons/button10Roll.gif";

img10off = new Image();
img10off.src = "_images/_buttons/button10.gif";

function imgon(imgName){
	document[imgName].src = eval(imgName + 'on.src');
	}
	
function imgoff(imgName){
	document[imgName].src = eval(imgName + "off.src");
	}