var e1 = "nabus";
var e2 = "vien";
var e3 = "nfo";
var e4 = "i";
var e5 = "com";
document.write("<a href=" + "mail" + "to:" + e4 + e3 + "@" + e2 + e1 + "." + e5 + ">" + "<img src='busvermietung/charter-busse.jpg' width='200' height='50' border='0'>" + "</a>");