image = new Image();
image.src = "http://www.himinohana.jp/favicon/favicon_cos.ico";

document.write("<link rel='shortcut icon' href='http://www.himinohana.jp/favicon/favicon_cos.ico' type='image/vnd.microsoft.icon' />")
document.write("<link rel='icon' href='http://www.himinohana.jp/favicon/favicon_cos.ico' type='image/vnd.microsoft.icon' />")