function CheckFields () {

  var sEmail;
  var sAbout;
  var sClassinfo;
  sEmail = document.getElementById("email").value;
  sAbout = document.getElementById("about").value;
  sClassinfo = document.getElementById("classinfo").value;
  if (document.getElementById("survivor").value == '') {
    document.getElementById("survivor").focus();
    alert("Please specify name of survivor");
    return;
	}
  if (document.getElementById("yourname").value == '') {
    document.getElementById("yourname").focus();
    alert("Please enter your name");
    return;
  }
  if (sEmail == '') {
    document.getElementById("email").focus();
    alert("Please enter your email address");
    return;
  }
  if (sEmail == "webmaster@olafire.com") {
    document.getElementById("email").value = '';
    document.getElementById("email").focus();
    alert("Please enter YOUR email address");
    return;
  }
  if (sEmail.indexOf("@guvan.com") >= 0) {
    alert("Spam not allowed");
    return;
	}
  if (sEmail.indexOf("@") < 0) {
    alert("Invalid email address specified - please enter your email address");
    return;
	}
  if (sAbout.toUpperCase().indexOf("HTTP://") >= 0) {
    alert("Spam not allowed");
    return;
	}
  if (sAbout.toUpperCase().indexOf("HTTPS://") >= 0) {
    alert("Spam not allowed");
    return;
	}
  if (sAbout.toUpperCase().indexOf("WWW.") >= 0) {
    alert("Spam not allowed");
    return;
	}
  if (sClassinfo.toUpperCase().indexOf("HTTP://") >= 0) {
    alert("Spam not allowed");
    return;
	}
  if (sClassinfo.toUpperCase().indexOf("HTTPS://") >= 0) {
    alert("Spam not allowed");
    return;
	}
  if (sClassinfo.toUpperCase().indexOf("WWW.") >= 0) {
    alert("Spam not allowed");
    return;
	}
  document.getElementById("sendinfo").submit()
}