function plan() {
var location = "plan/";
window.open(location, 'PopUp', 'toolbar=0, location=0, directories=0, status=0, menubar=0, scrollbars=0, width=520, height=530, resizable=1');
}

function zoom(path,w,h) {
var file = "http://www.erlebnispark.cc/zoom.shtml?" + path;
window.open(file, 'PopUp', 'toolbar=0, location=0, directories=0, status=0, menubar=0, scrollbars=0, width='+w+', height='+h+', resizable=1');
}