var newwindow = ''
function popitup(url) {
if (newwindow.location && !newwindow.closed) {
    newwindow.location.href = url;
    newwindow.focus(); }
else {
    newwindow=window.open(url,'htmlname','width=400,height=300,resizable=1');}
}

function jemail(user, domain, suffix) {
   document.write('<a href="' + 'mailto:' + user + '@' + domain + '.' + suffix + '">' + user + '@' + domain + '.' + suffix + '</a>');
}