//Wechselt das obige Banner im 30 Sek.-Takt
function diashow(){

        var a = Math.round(22*Math.random());
        dia = "http://www.drk.de/images/head_banner/head_banner"+a+".jpg";
        window.document.getElementById("changingheadbanner").src=dia;
        window.setTimeout ('diashow ()' , 30000)
}