//画像の切り替え
function cngImg1(imgname1){
document.strimg1.src = imgname1;
}

function cngImg2(imgname2){
document.strimg2.src = imgname2;
}

function cngImg3(imgname3){
document.strimg3.src = imgname3;
}

function cngImg4(imgname4){
document.strimg4.src = imgname4;
}

function cngImg(imgname){
document.Myimg.src = imgname;
}