function generate_address( username ) {
        var atsign = "@";
        var addr = username + atsign + "rosehill.org.uk" ;
        document.write( 
          "<" + "a" + " " + "href=" + "mail" + "to:" + addr + ">" +
          addr +
          "<\/a>");
     }
 
function generate_address2( username ) {
        var atsign = "&#64;";
        var addr = username + atsign + "ntlworld.com" ;
        document.write( 
          "<" + "a" + " " + "href=" + "mail" + "to:" + addr + ">" +
          addr +
          "<\/a>");
     }