var vorn1, hint, nat;
vorn1 = "mail";
hint = "tukiendorf";
nat = "de";

function kontakt() {
	text1 = "<a href=\"mailto:";
    text2 = "\">";
    text3 = "</a>";
    kont = vorn1 + "@" + hint + "." + nat;
    text = text1 + kont + text2 + kont + text3;
    document.write(text);
}