var dname = "gruen";
var ddomain = "fab-ri.de";
var dtext;

function writmail(name,domain,text) {
 if (name) dname = name;
 if (domain) ddomain = domain;
 if (text) dtext = text;
 else dtext = dname + '@' + ddomain;
 document.write('<a href=\"mailto:' + dname + '@' + ddomain + '\">' + dtext + '<\/a>');
}