var emailkill = false;
function validate() {
var GoodVal=1;
var TmpVal= document.getElementById("Sender").value;
if (TmpVal=='') {
  errstr = 'Please enter a valid e-mail. \n';
  alert(errstr);
  return false;
} else {
  emailkill = false;
  emailCheck(TmpVal);
  if (emailkill) {
	return false;
  } else {
    var fn = document.getElementById("FirstName").value.length
	var ln = document.getElementById("LastName").value.length
	var prod = fn * ln
	if (prod == 0) {
	  errstr = 'Please enter a First and Last Name. \n';
	  alert(errstr);
	  return false;
	} else {
		var sub = document.getElementById("subject").value.length
		if (sub == 0) {
		  errstr = 'Please enter a Subject. \n';
		  alert(errstr);
		  return false;
		} else {
			var txt = document.mailform.TextBody.value
			if (txt == 'Type message here.' || txt == '') {
			  errstr = 'Please enter a Message. \n';
			  alert(errstr);
			  return false;
			}
		}
	}
  }
}
}

function emailCheck (emailStr) {
var checkTLD=1;
var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
var emailPat=/^(.+)@(.+)$/;
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 +")*$");
var matchArray=emailStr.match(emailPat);
if (matchArray==null) {
alert("Email address seems incorrect (check @ and .'s)");
emailkill = true;
return false;
}
var user=matchArray[1];
var domain=matchArray[2];
for (i=0; i<user.length; i++) {
if (user.charCodeAt(i)>127) {
alert("Ths username contains invalid characters.");
emailkill = true;
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
alert("Ths domain name contains invalid characters.");
emailkill = true;
return false;
   }
}
if (user.match(userPat)==null) {
alert("The username doesn't seem to be valid.");
emailkill = true;
return false;
}
var IPArray=domain.match(ipDomainPat);
if (IPArray!=null) {
for (var i=1;i<=4;i++) {
if (IPArray[i]>255) {
alert("Destination IP address is invalid!");
emailkill = true;
return false;
   }
}
event.returnValue=true;
}
var atomPat=new RegExp("^" + atom + "$");
var domArr=domain.split(".");
var len=domArr.length;
for (i=0;i<len;i++) {
if (domArr[i].search(atomPat)==-1) {
alert("The domain name does not seem to be valid.");
emailkill = true;
return false;
   }
}
if (checkTLD && domArr[domArr.length-1].length!=2 && 
domArr[domArr.length-1].search(knownDomsPat)==-1) {
alert("The address must end in a well-known domain or two letter " + "country.");
emailkill = true;
return false;
}
if (len<2) {
alert("This address is missing a hostname!");
emailkill = true;
return false;
}
}