b0off = new Image();
b0off.src = "gfx/btn_1.gif";
b0on = new Image();
b0on.src = "gfx/btn_1on.gif";

b1off = new Image();
b1off.src = "gfx/btn_2.gif";
b1on = new Image();
b1on.src = "gfx/btn_2on.gif";

b2off = new Image();
b2off.src = "gfx/btn_3.gif";
b2on = new Image();
b2on.src = "gfx/btn_3on.gif";

b3off = new Image();
b3off.src = "gfx/btn_4.gif";
b3on = new Image();
b3on.src = "gfx/btn_4on.gif";

b4off = new Image();
b4off.src = "gfx/btn_5.gif";
b4on = new Image();
b4on.src = "gfx/btn_5on.gif";

b5off = new Image();
b5off.src = "gfx/btn_6.gif";
b5on = new Image();
b5on.src = "gfx/btn_6on.gif";

b6off = new Image();
b6off.src = "gfx/btn_7.gif";
b6on = new Image();
b6on.src = "gfx/btn_7on.gif";

b7off = new Image();
b7off.src = "gfx/btn_8.gif";
b7on = new Image();
b7on.src = "gfx/btn_8on.gif";

function myfun() {
	if (xmenu == 0) {
		document.images['b0'].src=b0off.src;
	}
}

function myfun2() {
	if (ymenu == 0) {
		document.images['b2'].src=b2off.src;
	}
}

function myfun3() {
	if (zmenu == 0) {
		document.images['b3'].src=b3off.src;
	}
}