url= new Array();
//ジャンプ先のURL
url[0] = "seminar101016.html";
url[1] = "seminar100724.html";
url[2] = "seminar100901.html";
url[3] = "seminar100915.html";
url[4] = "seminar100928.html";
url[5] = "seminar101008.html";
url[6] = "seminar101020.html";


banner= new Array();
//表示バナー配列
//括弧の中の数字はジャンプ先URLの数字と対応させて下さい
banner[0] = "images/top/bn-101016.jpg";
banner[1] = "images/top/bn-100724.gif";
banner[2] = "images/top/bn-100901.jpg";
banner[3] = "images/top/bn-100915.jpg";
banner[4] = "images/top/bn-100928.jpg";
banner[5] = "images/top/bn-101008.gif";
banner[6] = "images/top/bn-101020.gif";

function my_jump(){
max_banner=banner.length;
i_num = Math.floor(Math.random() * max_banner);
document.write("<a href='"+url[i_num]+"'>");
document.write("<img src='"+banner[i_num]+"' border=0 class='rollover bottom10'></a>");
}