function one() {if (document.images) document.b1.src= 'images/sixboxes_01.jpg';}

function two() {if (document.images) document.b2.src= 'images/sixboxes_03.jpg';}

function three() {if (document.images) document.b3.src= 'images/sixboxes_05.jpg';}

function four() {if (document.images) document.b4.src= 'images/sixboxes_07.jpg';}

function five() {if (document.images) document.b5.src= 'images/sixboxes_09.jpg';}

function six() {if (document.images) document.b6.src= 'images/sixboxes_11.jpg';}

function restore() {if (document.images) document.b1.src= 'images/sixboxes_off_01.jpg'; if (document.images) document.b2.src= 'images/sixboxes_off_03.jpg'; if (document.images) document.b3.src= 'images/sixboxes_off_05.jpg'; if (document.images) document.b4.src= 'images/sixboxes_off_07.jpg'; if (document.images) document.b5.src= 'images/sixboxes_off_09.jpg'; if (document.images) document.b6.src= 'images/sixboxes_off_11.jpg';}