var good;
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('Please enter a valid e-mail address.')
   field.focus()
   field.select()
   good = false
   }
}

function sendOff(){
        
   good = false
   checkEmailAddress(document.form1.email)      
   if ((document.form1.email.value != document.form1.email2.value)&&(good)){
          alert('Both e-mail address entries must match.')
   }
}