function mailadd (which) {
   var one = "info@";
   var two = "cseltd.c";
   var three = "o.uk";
   return one+two+three;
}
function mailtag (which,subject) {
   return '<a href=\"mailto:' + mailadd(which) + '?subject=' + subject + '\">';
}
function maillink (which,text,subject) {
   if (!text) text = mailadd(which);
   if (!subject) subject = "Email from CSE web site";
   return mailtag(which,subject) + text + "</a>";
}