function setSubscribeForm()
{  
	document.subscribeForm.reset();
}

function clearText(field)
{
    field.value = '';
}

function defaultText(field)
{
    field.value = field.defaultValue; 
}

/**
 * JavaScript function to check an email address conforms to RFC822 (http://www.ietf.org/rfc/rfc0822.txt)
 *
 * Version: 0.2
 * Author: Ross Kendall
 * Created: 2006-12-16
 * Updated: 2007-03-22
 *
 * Based on the PHP code by Cal Henderson
 * http://iamcal.com/publish/articles/php/parsing_email/
 */

function checkEmailField(emailField) {
  var email = emailField.value;
  if (!isRFC822ValidEmail(email)) {
	document.getElementById('subscription_form').style.display = "block"; 
	if(document.all){
		document.getElementById('subscription_form').innerText = "Please enter a valid email address.";
	} else{
		document.getElementById('subscription_form').textContent = "Please enter a valid email address.";
	}
    emailField.focus();
    return false;
  }
  return true;
}

function isRFC822ValidEmail(sEmail) {

  var sQtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]';
  var sDtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]';
  var sAtom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+';
  var sQuotedPair = '\\x5c[\\x00-\\x7f]';
  var sDomainLiteral = '\\x5b(' + sDtext + '|' + sQuotedPair + ')*\\x5d';
  var sQuotedString = '\\x22(' + sQtext + '|' + sQuotedPair + ')*\\x22';
  var sDomain_ref = sAtom;
  var sSubDomain = '(' + sDomain_ref + '|' + sDomainLiteral + ')';
  var sWord = '(' + sAtom + '|' + sQuotedString + ')';
  var sDomain = sSubDomain + '(\\x2e' + sSubDomain + ')*';
  var sLocalPart = sWord + '(\\x2e' + sWord + ')*';
  var sAddrSpec = sLocalPart + '\\x40' + sDomain; // complete RFC822 email address spec
  var sValidEmail = '^' + sAddrSpec + '$'; // as whole string
  
  var reValidEmail = new RegExp(sValidEmail);
  
  if (reValidEmail.test(sEmail)) {
    return true;
  }  
  return false;
}