var submitcount=0;
function ask() {
if (confirm("Please Note:\n\nAll information submitted is stored on a computer system,\nPlease press the Cancel button if you object to this...\n")) {
	validate(); }
else {
	return false;		}
}

function validate() {
var myindex;
if (document.contact.name.value == "") {
		alert("You have not entered your Name");
		document.contact.name.focus();
		return false;
	}
if (document.contact.address.value == "") {
		alert("You have not entered your Address");
		document.contact.address.focus();
		return false;
	}
var emailStr = document.contact.email.value;
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)")
		document.contact.email.focus();
		return false;
}
var user=matchArray[1]
var domain=matchArray[2]
if (user.match(userPat)==null) {
    alert("The username doesn't seem to be valid.")
		document.contact.email.focus();
		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!")
		document.contact.email.focus();
		return false;
	    }
   }
}
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("The domain name doesn't seem to be valid.")
		document.contact.email.focus();
		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) {
   alert("The address must end in a three-letter domain, or two letter country.")
		document.contact.email.focus();
		return false;
}
if (len<2) {
   var errStr="This address is missing a hostname!"
   alert(errStr)
		document.contact.email.focus();
		return false;
}


if (submitcount == 0) {
	submitcount++;
	}
else 
	{
	alert("Sorry,\nYou have already submitted this form!!!");
	return false;
}
	document.contact.sButton.value = " Processing...... "
	document.contact.submit();
}