function preload(){
new Image().src="imeges/b0-02.gif";
new Image().src="imeges/b1-02.gif";
new Image().src="imeges/b2-02.gif";
new Image().src="imeges/b3-02.gif";
new Image().src="imeges/b4-02.gif";
new Image().src="imeges/b5-02.gif";
new Image().src="imeges/b6-02.gif";
new Image().src="imeges/b7-02.gif";
new Image().src="imeges/b8-02.gif";
new Image().src="imeges/b9-02.gif";
}

function button0(buttongazo){
document.getElementById('home')
.setAttribute('src',buttongazo);
}

function button1(buttongazo){
document.getElementById('jigyou')
.setAttribute('src',buttongazo);
}

function button2(buttongazo){
document.getElementById('sukim')
.setAttribute('src',buttongazo);
}

function button3(buttongazo){
document.getElementById('gyoumu')
.setAttribute('src',buttongazo);
}

function button4(buttongazo){
document.getElementById('syoukai')
.setAttribute('src',buttongazo);
}

function button5(buttongazo){
document.getElementById('qa')
.setAttribute('src',buttongazo);
}

function button6(buttongazo){
document.getElementById('gaiyou')
.setAttribute('src',buttongazo);
}

function button7(buttongazo){
document.getElementById('watashi')
.setAttribute('src',buttongazo);
}

function button8(buttongazo){
document.getElementById('uke')
.setAttribute('src',buttongazo);
}

function button9(buttongazo){
document.getElementById('blog')
.setAttribute('src',buttongazo);
}