imgon_a=new Array();
for(i=0;i<=12;i++){
    imgon_a[i]=new Image();
    imgon_a[i].src="images/botan/a_"+i+".jpg";
    }
imgon_v=new Array();
for(i=0;i<=12;i++){
    imgon_v[i]=new Image();
    imgon_v[i].src="images/botan/v_"+i+".jpg";
    }
imgon_s=new Array();
for(i=0;i<=12;i++){
    imgon_s[i]=new Image();
    imgon_s[i].src="images/botan/s_"+i+".jpg";
    }
function changeImage_act(s){
    document.images['img'+s].src=imgon_s[s].src;
}
function changeImage_visi(s){
    document.images['img'+s].src=imgon_a[s].src;
}
function changeImage_out(s){
    document.images['img'+s].src=imgon_v[s].src;
}