function xhtmlValidatity10() {
document.write ("<a href=\"http://validator.w3.org/check?uri=referer\">\r\n");
document.write ("<img class=\"w3cvalidation\"\r\n");
document.write ("src=\"http://www.w3.org/Icons/valid-xhtml10\"\r\n");
document.write ("alt=\"Valid XHTML 1.0!\" /></a>");
}

function xhtmlValidatity11() {
document.write ("<a href=\"http://validator.w3.org/check?uri=referer\">\r\n");
document.write ("<img class=\"w3cvalidation\"\r\n");
document.write ("src=\"http://www.w3.org/Icons/valid-xhtml11\"\r\n");
document.write ("alt=\"Valid XHTML 1.1!\" /></a>");
}

function cssValidatity() {
document.write ("<a href=\"http://jigsaw.w3.org/css-validator/check/referer\">\r\n");
document.write ("<img class=\"w3cvalidation\"\r\n");
document.write ("src=\"http://jigsaw.w3.org/css-validator/images/vcss\"\r\n");
document.write ("alt=\"Valid CSS!\" /></a>");
}

function valid_address(email)
{
  var validity = false
  var beginning = new RegExp("^[a-z]","i")
  var ending = new RegExp("\.[a-z]{2,3}$","i")
  var at = new RegExp("@")
  if (email.indexOf("@") == email.lastIndexOf("@") &&
      email.indexOf("@.") ==  -1 &&
      beginning.test(email) &&
      ending.test(email) &&
      at.test(email))
    {
       validity = true
    }
  return validity
}