function openMap(url) {
         newwindow=window.open(url,'Landkarte','height=692,width=792');
         if (window.focus) {newwindow.focus()}
         return false;
}

function openMainWindow(url) {
         opener.location.href = url;
}

function showHide(id) {
    obj = document.getElementsByTagName("div");
    if (obj[id].style.visibility == 'visible'){
    	obj[id].style.visibility = 'hidden';
    }
    else {
    	obj[id].style.visibility = 'visible';
    }
}