var how_many_ads = 5;

var now = new Date()

var sec = now.getSeconds()

var ad = sec % how_many_ads;

var src ="gfx/sidebar/"

var ext =".jpg"

ad +=1;

url="";

alt="";

width="130";

if (ad==1) {
banner = src + "klimtingold.jpg";
height="287";
txt="Der Küss (Detail)<br>1907 Gustav Klimt<br><br>Jugendstil creatie<br>bladgoud en olie op doek<br><br>Copyright © <br>Österreichische Galerie<br>Belvedere, Wenen";
}

if (ad==2) {
banner = src + "Der.Kuss.Klimt.jpg";
height="193";
txt="Der Küss (Detail)<br>1907 Gustav Klimt<br><br>Copyright © <br>Österreichische Galerie<br>Belvedere, Wenen";
}

if (ad==3) {
banner = src + "problemenvandedenker.jpg";
height="163";
txt="Problemen van de Denker<br>1983 Roger Raveel<br><br>Copyright © <br>Stichting Roger Raveel"; 
}

if (ad==4) {
banner = src + "handvandevader.jpg";
height="177";
txt="Met de hand van de Vader<br>(detail)<br>1965 Roger Raveel<br><br>Copyright ©<br>Stichting Roger Raveel"; 
}

if (ad==5) {
banner = src + "scandoomkerke.jpg";
height="109";
txt="Doomkerke<br>1965 Roger Raveel<br><br>Copyright ©<br>Stichting Roger Raveel"; 
}