function change_adv()
{var changenumber =3;
var today = new Date();
var rd = today.getSeconds();
var ra = rd % changenumber;
if (ra==0) {
	document.write('<a href="http://www.sony.com.tw/event/dsc-pseries" target="_blank"><img src="images/468x60_1025.gif" width="468" height="60" border="0"></a>');
	}
else if (ra==1) {
	document.write('<a //href="http://www.deltamac.com.tw/fantasy/index.htm" target="_blank"><img //src="images/468x60_1101.gif" width="468" height="60" border="0"></a>');
	}
else {
	document.write('<a href="http://www.supertv.com.tw/index1022.html" target="_blank"><img src="images/468x60_1101_2.gif" width="468" height="60" border="0"></a>');
	}
}