function bildwechsel() {
   var boxlinks1 = document.getElementById("infobox-links");
   boxlinks1.style.backgroundImage = "url(images/headerleftboxoben.jpg)";
}
function zurueck() {
   var boxlinks1 = document.getElementById("infobox-links");
   boxlinks1.style.backgroundImage = "url(images/infobox-links.jpg)";
}



function bildwechselrechtsoben() {
   var boxlinks1 = document.getElementById("infobox-rechts");
   boxlinks1.style.backgroundImage = "url(images/headerrightboxoben.jpg)";
}
function zurueckrechtsoben() {
   var boxlinks1 = document.getElementById("infobox-rechts");
   boxlinks1.style.backgroundImage = "url(images/infobox-rechts.jpg)";
}



function bildwechselrechtsunten() {
   var boxlinks1 = document.getElementById("infobox-rechts");
   boxlinks1.style.backgroundImage = "url(images/headerrightboxunten.jpg)";
}
function zurueckrechtsunten() {
   var boxlinks1 = document.getElementById("infobox-rechts");
   boxlinks1.style.backgroundImage = "url(images/infobox-rechts.jpg)";
}