function parky_on() { document.parky.src="images/button1-parky-on.jpg"; };
function parky_off() { document.parky.src="images/button1-parky.jpg"; };

function laminate_on() { document.laminate.src="images/button1-laminate-on.jpg"; };
function laminate_off() { document.laminate.src="images/button1-laminate.jpg"; };

function solidwood_on() { document.solidwood.src="images/button2-solidwood-flooring-on.jpg"; };
function solidwood_off() { document.solidwood.src="images/button2-solidwood-flooring.jpg"; };

function traviloc_on() { document.traviloc.src="images/button3-traviloc-on.jpg"; };
function traviloc_off() { document.traviloc.src="images/button3-traviloc.jpg"; };