if (document.images) 
{

img1on = new Image();
	img1on.src = "images/thos.gif";
	img1off = new Image();
	img1off.src = "images/tho.gif";

img2on = new Image();
	img2on.src = "images/tlas.gif";
	img2off = new Image();
	img2off.src = "images/tla.gif";

img3on = new Image();
	img3on.src = "images/tfos.gif";
	img3off = new Image();
	img3off.src = "images/tfo.gif";

img4on = new Image();
	img4on.src = "images/tprs.gif";
	img4off = new Image();
	img4off.src = "images/tpr.gif";

img5on = new Image();
	img5on.src = "images/tans.gif";
	img5off = new Image();
	img5off.src = "images/tan.gif";

img6on = new Image();
	img6on.src = "images/taps.gif";
	img6off = new Image();
	img6off.src = "images/tap.gif";
	
img7on = new Image();
	img7on.src = "images/tbus.gif";
	img7off = new Image();
	img7off.src = "images/tbu.gif";

img8on = new Image();
	img8on.src = "images/tems.gif";
	img8off = new Image();
	img8off.src = "images/tem.gif";

img9on = new Image();
	img9on.src = "images/tlis.gif";
	img9off = new Image();
	img9off.src = "images/tli.gif";

;
}

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");
	}
}