// START Experience validation functions
function validate() {
	
	if (document.request.firstname.value.length < 1) {
		alert("Please enter your First name.");
		document.request.firstname.focus();
		return false;	
		}
	if (document.request.surname.value.length < 1) {
		alert("Please enter your Surname.");
		document.request.surname.focus();
		return false;	
		}
	if (document.request.industry.value.length < 1) {
		alert("Please enter your Industry.");
		document.request.industry.focus();
		return false;	
		}
	if (document.request.postal.value.length < 1) {
		alert("Please enter your Postal address.");
		document.request.postal.focus();
		return false;	
		}
	if (document.request.suburb.value.length < 1) {
		alert("Please enter your Suburb.");
		document.request.suburb.focus();
		return false;	
		}
	if (document.request.phoneno.value.length < 1) {
		alert("Please enter your Phone number.");
		document.request.phoneno.focus();
		return false;	
		}
	if (! isValidEmail(document.request.email.value)) {
        alert("Please enter a valid email address");
        return false;
    }
	if (document.request.title.value.length < 1) {
		alert("Please enter Title of publication requested.");
		document.request.title.focus();
		return false;	
		}
}

function isValidEmail(email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    } else if (email.indexOf("..") >=0) { // two periods in a row is not valid
	return false;
    } else if (email.indexOf(".") == email.length) {  // . must not be the last character
	return false;
    }
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}