function button11(){
document.getElementById('bana1')
.setAttribute('src','index/menu/bana1.jpg');
}

function buttonout11(){
document.getElementById('bana1')
.setAttribute('src','index/menu/bana11.jpg');
}


function button22(){
document.getElementById('bana2')
.setAttribute('src','index/menu/bana2.jpg');
}

function buttonout22(){
document.getElementById('bana2')
.setAttribute('src','index/menu/bana22.jpg');
}


function button33(){
document.getElementById('bana3')
.setAttribute('src','index/menu/bana3.jpg');
}

function buttonout33(){
document.getElementById('bana3')
.setAttribute('src','index/menu/bana33.jpg');
}


function button44(){
document.getElementById('bana4')
.setAttribute('src','index/menu/bana4.jpg');
}

function buttonout44(){
document.getElementById('bana4')
.setAttribute('src','index/menu/bana44.jpg');
}


function button55(){
document.getElementById('bana5')
.setAttribute('src','index/menu/bana5.jpg');
}

function buttonout55(){
document.getElementById('bana5')
.setAttribute('src','index/menu/bana55.jpg');
}


function button66(){
document.getElementById('ka_to')
.setAttribute('src','index/menu/ka-to-1.gif');
}

function buttonout66(){
document.getElementById('ka_to')
.setAttribute('src','index/menu/ka-to.gif');
}



<!--特定商法-->
function winnew3(){
window.open("torihiki.html","ka_to","width=520,height=520,menubar=yes,scrollbars=yes,toolbar=yes,resizable=yes,status=yes");
}
<!--ギフト-->
function gift(){
window.open("message.html","gift","width=520,height=520,menubar=yes,scrollbars=yes,toolbar=yes,resizable=yes,status=yes");
}

<!--クレジット-->
function credit(){
window.open("credit.html","ka_to","width=500,height=470,menubar=yes,scrollbars=yes,toolbar=yes,resizable=yes,status=yes");
}

<!--カートを見る-->
function win(){
window.open("http://shop.giro-ya.com/eshopdo/refer/refer.php?sid=sg73392","shop","width=730,height=800,menubar=yes,scrollbars=yes,toolbar=yes,resizable=yes,status=yes");
}
<!--会員登録について-->
function kanin(){
window.open("kanin.html","kanin","width=500,height=380,menubar=yes,scrollbars=yes,toolbar=yes,resizable=yes,status=yes");
}