function winOpenAu(){
    window.open("plan_au.html","popup_au","width=610, height=610, status =no, toolbar = no, menubar = no, location = no, resizable = yes, scrolling = yes, titelbar = no, top = 0, left = 0");
}

function winOpenSand(){
    window.open("plan.html","popup_sand","width=610, height=610, status =no, toolbar = no, menubar = no, location = no, resizable = yes, scrolling = yes, titelbar = no, top = 0, left = 0");
}

function winOpenMusik(){
    window.open("music.html","popup_sand","width=260, height=60, status =no, toolbar = no, menubar = no, location = 0, resizable = yes, scrolling = yes, titelbar = no, top=600, left=100");
}