index = Math.floor(Math.random() * 3);
switch (index){
	case 0: //scupio
		document.write('<scri'+'pt type="text/ja'+'vascript" src="http://adsense.scupio.com/adpinline/ADmediaJS/libertytimes_731_1849_2515_1.j'+'s"></scr'+'ipt>');
	break;

	case 1: //yahoo
		document.write('<iframe src="http://iservice.libertytimes.com.tw/IService2/adyahoo2.php?l=i&u='+location.pathname+'" width="565" height="290" frameborder="0" scrolling="no" class="ad-yahoo"></iframe>');
	break;
	case 2: //scupio
		document.write('<scri'+'pt type="text/ja'+'vascript" src="http://adsense.scupio.com/adpinline/ADmediaJS/libertytimes_731_1849_2515_1.j'+'s"></scr'+'ipt>');
	break;
}