var good;
var url = "http://www.dqcounseling.org";
function checkEmailAddress(field) {
var goodEmail = field.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi);
if (goodEmail){
   good = true
} else {
   alert('Inserire un indirizzo e-mail valido.')
   field.focus();
   field.select();
   good = false;
  }
}

// u = window.location;
u = url;
m = "Ti segnalo questo sito";
function mailThisUrl(){
   good = false
   checkEmailAddress(document.eMailer.address)
   if (good){
      window.location = "mailto:"+document.eMailer.address.value+"?subject="+m+"&body="+u;
   }
}