Image1 = new Image (16, 40)
Image1.src = "nobottle.jpg"
Image2 = new Image ( 16 , 40)
Image2.src = "bottle.jpg"

function a1 ( ){
document.button1.src = Image2.src ; return true ;
}
function b1 ( ) {
document.button1.src = Image1.src ; return true ;
}

function a2 ( ){
document.button2.src = Image2.src ; return true ;
}
function b2 ( ) {
document.button2.src = Image1.src ; return true ;
}
function a3 ( ){
document.button3.src = Image2.src ; return true ;
}
function b3 ( ) {
document.button3.src = Image1.src ; return true ;
}
function a4 ( ){
document.button4.src = Image2.src ; return true ;
}
function b4 ( ) {
document.button4.src = Image1.src ; return true ;
}
function a5 ( ){
document.button5.src = Image2.src ; return true ;
}
function b5 ( ) {
document.button5.src = Image1.src ; return true ;
}
function a6 ( ){
document.button6.src = Image2.src ; return true ;
}
function b6 ( ) {
document.button6.src = Image1.src ; return true ;
}
function a7 ( ){
document.button7.src = Image2.src ; return true ;
}
function b7 ( ) {
document.button7.src = Image1.src ; return true ;
}