//グローバルメニューの数
var preimg = new Array(7);
for (i=1;i<7;i++){
    preimg[i] = new Image;
    preimg[i].src = pass+"img/top_mainmenu_00"+(i)+"o.gif";
}

var preimg2 = new Array(3);
for (i=1;i<3;i++){
    preimg2[i] = new Image;
    preimg2[i].src = pass+"img/contents"+(i)+"_ro.gif";
}

function chimg(over){
img1 = new Image;
img1.src = pass +"img/top_"+over+"o.gif";
document.images[over].src = img1.src;
return true;
}

function bkimg(out){
img2 = new Image;
img2.src = pass +"img/top_"+out+".gif";
document.images[out].src = img2.src;
return true;
}

function chimg2(over){
img1 = new Image;
img1.src = pass +"img/"+over+"_ro.gif";
document.images[over].src = img1.src;
return true;
}

function bkimg2(out){
img2 = new Image;
img2.src = pass +"img/"+out+".gif";
document.images[out].src = img2.src;
return true;
}