function oeffnenfenster(url,name){
 window.open(url,name,
                "width=800px,height=600px,top=100px,left=100px,scrollbars=yes,resizable=yes,status=yes");
}

function oeffnenbilder(url,name,width,height){
var bildfentser =  window.open(url,name,
                "width=369px,height=492px,scrollbars=no,resizable=yes,status=yes");
                if (bildfenster.opener == null) {
                    bildfenster.opener = window;
                    }

}