function validEmail(email) {
   invalidChars = " /:,;"
   if (email == "") {     
    return false
   }
   for (i=0; i<invalidChars.length; i++) { 
    badChar = invalidChars.charAt(i)
    if (email.indexOf(badChar,0) > -1) {
     return false
    }
   }
   atPos = email.indexOf("@",1)   
   if (atPos == -1) {
    return false
   }
   if (email.indexOf("@",atPos+1) != -1) {
    return false
   }
   periodPos = email.indexOf(".",atPos)
   if (periodPos == -1) {    
    return false
   }
   if (periodPos+3 > email.length) {  
    return false
   }
   return true
  }


  function submitIt(mailForm) {
   
   if (!validEmail(mailForm.email.value)) {
    alert("Invalid email address")
    mailForm.email.focus()
    mailForm.email.select()
    return false
   }
   return true
  }