rndmM = 2;
sec =(new Date()).getSeconds();
i = Math.floor(Math.random(sec)*rndmM)+1;
switch(i){

case 1: //光オールインワンパック
document.write('<a href="http://www.accesstrade.net/at/c.html?rk=010038900022nd" target="_blank"><img src="http://www.accesstrade.net/at/r.html?rk=010038900022nd" alt="" border="0" /></a>');
 break;
case 2: //KDDI ひかりone
document.write('<a href="http://www.accesstrade.net/at/c.html?rk=01003b730022nd" target="_blank"><img src="http://www.accesstrade.net/at/r.html?rk=01003b730022nd" alt="" border="0" /></a>');
 break;
}