var subject = "?Subject=Ocallagnans";
var email1 = "webmaster";
var email2 = "vieux-sorel";
var email3 = "com";
var tag = "Webmaster @ Robert Bonomo";
document.write("<a class='courriel' href=" + "mail" + "to:" + email1 + "@" + email2 + "." + email3 + subject + ">" + tag + "</a>")