var good;
function checkEmailAddress(field) {
var goodEmail = field.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\.co.nz)|(\.com.au)(\..{2,2}))$)\b/gi);
if (goodEmail) {
good = true;
}
else {
alert('Please enter a valid e-mail address.');
field.focus();
field.select();
good = false;
   }
}
u = window.location;
m = "Here's a site that might be of interest to you!";
function mailThisUrl() {
good = false
checkEmailAddress(document.eMailer.address);
if (good) {
// the following expression must be all on one line...
window.location = "mailto:"+document.eMailer.address.value+"?subject="+m+"&body="+document.eMailer.yourcomments.value+"%0d%0a%0d%0ahttp://www.centell.co.nz";
   }
}