function start() {
var at = document.getElementById("div-at");
var usa = document.getElementById("div-usa");
var po = document.getElementById("div-po");
var cz = document.getElementById("div-cz");
var esp = document.getElementById("div-esp");
var en = document.getElementById("div-en");
var de = document.getElementById("div-de");
var fr = document.getElementById("div-fr");
at.style.display = "none";
po.style.display = "none";
cz.style.display = "none";
esp.style.display = "none";
en.style.display = "none";
de.style.display = "none";
fr.style.display = "none";
usa.style.display = "none";
}

function sperren() {
var at = document.getElementById("div-at");
var po = document.getElementById("div-po");
var cz = document.getElementById("div-cz");
var esp = document.getElementById("div-esp");
var en = document.getElementById("div-en");
var de = document.getElementById("div-de");
var fr = document.getElementById("div-fr");
var usa = document.getElementById("div-usa");

var menu1 = document.international.menu1.options[document.international.menu1.selectedIndex].value;
if(menu1 == "0") {
at.style.display = "none";
po.style.display = "none";
cz.style.display = "none";
esp.style.display = "none";
en.style.display = "none";
de.style.display = "none";
fr.style.display = "none";
usa.style.display = "none";
}

if(menu1 == "1") {
at.style.display = "block";
po.style.display = "none";
cz.style.display = "none";
esp.style.display = "none";
en.style.display = "none";
de.style.display = "none";
fr.style.display = "none";
usa.style.display = "none";
}

if(menu1 == "2") {
at.style.display = "none";
po.style.display = "block";
cz.style.display = "none";
esp.style.display = "none";
en.style.display = "none";
de.style.display = "none";
fr.style.display = "none";
usa.style.display = "none";
}

if(menu1 == "4") {
at.style.display = "none";
po.style.display = "none";
cz.style.display = "block";
esp.style.display = "none";
en.style.display = "none";
de.style.display = "none";
fr.style.display = "none";
usa.style.display = "none";
}

if(menu1 == "5") {
at.style.display = "none";
po.style.display = "none";
cz.style.display = "none";
esp.style.display = "block";
en.style.display = "none";
de.style.display = "none";
fr.style.display = "none";
usa.style.display = "none";
}

if(menu1 == "6") {
at.style.display = "none";
po.style.display = "none";
cz.style.display = "none";
esp.style.display = "none";
en.style.display = "block";
de.style.display = "none";
fr.style.display = "none";
usa.style.display = "none";
}

if(menu1 == "7") {
at.style.display = "none";
po.style.display = "none";
cz.style.display = "none";
esp.style.display = "none";
en.style.display = "none";
de.style.display = "block";
fr.style.display = "none";
usa.style.display = "none";
}

if(menu1 == "8") {
at.style.display = "none";
po.style.display = "none";
cz.style.display = "none";
esp.style.display = "none";
en.style.display = "none";
de.style.display = "none";
fr.style.display = "block";
usa.style.display = "none";
}

if(menu1 == "9") {
at.style.display = "none";
po.style.display = "none";
cz.style.display = "none";
esp.style.display = "none";
en.style.display = "none";
de.style.display = "none";
fr.style.display = "none";
usa.style.display = "block";
}

}