<!--
function changeImage1_1(){
    document.a.src="img/01_btn1_r.gif";
}
function changeImage1_2(){
    document.a.src="img/01_btn1.gif";
}

function changeImage2_1(){
    document.b.src="img/01_btn2_r.gif";
}
function changeImage2_2(){
    document.b.src="img/01_btn2.gif";
}

function changeImage3_1(){
    document.a02.src="img/02_btn1_r.gif";
}
function changeImage3_2(){
    document.a02.src="img/02_btn1.gif";
}

function changeImage4_1(){
    document.b02.src="img/02_btn2_r.gif";
}
function changeImage4_2(){
    document.b02.src="img/02_btn2.gif";
}

function changeImage5_1(){
    document.c02.src="img/02_btn3_r.gif";
}
function changeImage5_2(){
    document.c02.src="img/02_btn3.gif";
}

function changeImage6_1(){
    document.a03.src="img/03_btn1_r.gif";
}
function changeImage6_2(){
    document.a03.src="img/03_btn1.gif";
}

function changeImage7_1(){
    document.b03.src="img/03_btn2_r.gif";
}
function changeImage7_2(){
    document.b03.src="img/03_btn2.gif";
}