// JavaScript Document

      function submitForm(form) {
       if (checkIt(form)) {
         form.submit();
       }
      }
      function checkIt(form) {
      var name = form.name.value;
      var email = form.email.value;
      var message = form.message.value;
      var lib;
      var msg = '';

      if(name.length < 1) {
      if(msg.length > 0)
      msg+=', ';
      msg += 'Your Name';
      }

      if(email.length < 1) {
      if(msg.length > 0)
      msg+=', ';
      msg += 'Email Address';
      }

      if(message.length < 1) {
      if(msg.length > 0)
      msg+=', ';
      msg += 'Message';
      }

      if (msg != '')
      {
      alert("One or more required fields are blank\r\n" + msg);
      return false;
      }

      if (emailCheck(email, true)) {
      return true;
      }
      else {
      return false;
      }
      }

function emailCheck (emailStr, alertflag) {

var emailPat=/^(.+)@(.+)$/
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
var validChars="\[^\\s" + specialChars + "\]"
var quotedUser="(\"[^\"]*\")"
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
var atom=validChars + '+'
var word="(" + atom + "|" + quotedUser + ")"
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
        if (alertflag)
        alert("Email address seems incorrect (check @ and .'s)")
        return false
}
var user=matchArray[1]
var domain=matchArray[2]

// See if "user" is valid
if (user.match(userPat)==null) {
    // user is not valid
     if (alertflag)
    alert("The username doesn't seem to be valid.")
    return false
}

/* if the e-mail address is at an IP address (as opposed to a symbolic
   host name) make sure the IP address is valid. */
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
          for (var i=1;i<=4;i++) {
            if (IPArray[i]>255) {
      if (alertflag)
                alert("Destination IP address is invalid!")
                return false
            }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
      if (alertflag)
        alert("The domain name doesn't seem to be valid.")
    return false
}


var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 ||
    domArr[domArr.length-1].length>3) {
   // the address must end in a two letter or three letter word.
      if (alertflag)
   alert("The address must end in a three-letter domain, or two letter country.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="This address is missing a hostname!"
      if (alertflag)
   alert(errStr)
   return false
}

// If we've gotten this far, everything's valid!
return true;
}