function protectMail(part1,part2,part3){
    var part1 = "kontakt";
    var part2 = "rogernydegger.ch";
    var part3 = "KONTAKT";
    var output = '<a href="mai' + 'lto:' + part1 + '@' + part2 + '">' + part3 + '</a>';
    document.write(output);
   // return output;
    //alert(output);
}

/*
<script language="JavaScript"> protectMail('<email vorne>','<domain>','<link titel>');</script> 
*/