today=new Date();

if ((today.getHours() >= 0) && (today.getHours() <= 08))
                   {URL1="http://reiseberichte.topsitetube.de/in.php?id=7"} 

if ((today.getHours() >= 08) && (today.getHours() <= 11))
                   {URL1="http://click.listinus.de/79619"} 
 
if ((today.getHours() >= 11) && (today.getHours() <= 24))
                   {URL1="http://www.nudisttop100.com/cgi-bin/toplist/rankem.cgi?id=kalimera"}