img = new Array;
url = new Array;

						                                    //画像のファイル名を記述 []内の番号は0から
	                                                       //URLを記述

img[0] ="images/topics07.jpg";
url[0] ="http://www.mamarefre.jp/childcare/baby01b.html#F01";

img[1] ="images/topics06.jpg";
url[1] ="http://www.mamarefre.jp/information/index.php#77";

img[2] ="images/topics07.jpg";
url[2] ="http://www.mamarefre.jp/childcare/baby01b.html#F01";

img[3] ="images/topics06.jpg";
url[3] ="http://www.mamarefre.jp/information/index.php#77";

img[4] ="images/topics05.jpg";
url[4] ="http://www.mamarefre.jp/event/mamarefre/index.html";

n = Math.floor(img.length*Math.random());
document.write("<a href='"+url[n]+"'><img src='"+img[n]+"' border='0'></a>");