var subject = "?Subject=Atelier%20la%20Quenouille";
var email1 = "jean.gauthier";
var email2 = "enter-net";
var email3 = "com";
var tag = "Jean Gauthier";
document.write("<a href=" + "mail" + "to:" + email1 + "@" + email2 + "." + email3 + subject + ">" + tag + "</a>")