//画像などを少しずつ表示させるプログラム
var after = 60; // 秒数を指定
var tid1;
var tid2;

window.onload = function () {
fdi2();
tid2=window.setInterval("fdi2()", after*6000);
};
function fdi2() {
var img1 = document.getElementById("middle_content");
img1.style.visibility = "visible";
fadeIn("middle_content", 0);
}

function fadeIn(imgId, opacity) {
if (opacity <= 100) {
setOpacity(document.getElementById(imgId), opacity);
opacity += 1;
tid1=window.setTimeout("fadeIn('" + imgId + "'," + opacity + ")", 40);
} else {
window.clearTimeout(tid1);
}
}
function setOpacity(img, opacity) {
img.style.filter = "alpha(opacity:" + opacity + ")";
img.style.KHTMLOpacity = opacity / 100;
img.style.MozOpacity = opacity / 100;
img.style.opacity = opacity / 100;
}