function preorder() {
  window.open("/persepress/Preorder.aspx", "winPreOrder", 
              "menubar=0,status=1,toolbar=0,location=0,directories=0,scrollbars=1,resizable=1,width=600,height=600"); 
}

function sign_up_for_mailing_list(emailAddressField) {
  if ( emailAddressField == null ) { return; }
  val = emailAddressField.value;
  if ( ( val == null ) || ( val == "" ) ) {
    emailAddressField.value = "Please enter your email address";
  } else if ( val == "Please enter your email address" ) {
    // Do nothing
  } else if ( val == "Thank you!" ) {
    emailAddressField.value = "";
  } else if ( val.length <= 200 ) {
    try {
      XMLHTTP_getPage("http://www.persepress.com/MailingListSignUp.aspx", "e="+val);
      emailAddressField.value = "Thank you!";
    } catch ( ee ) {
      window.location = "http://www.persepress.com/Contact.aspx";
    }
  }
}

function show_interest(emailAddressField, medievalCheckbox, jungleCheckbox, 
                       spaceCheckbox, wackyCheckbox, messageSpan) {
  val = emailAddressField.value;
  if ( ( val == null ) || ( val == "" ) ) {
    messageSpan.innerHTML = "<br>Please enter your email address<br>";
  } else if ( val == "<br>Thank you!<br>" ) {
    emailAddressField.value = "";
    messageSpan.innerHTML = "";
  } else if ( ( medievalCheckbox.checked == false ) && ( jungleCheckbox.checked == false ) &&
              ( spaceCheckbox.checked    == false ) && ( wackyCheckbox.checked  == false ) ) {
    messageSpan.innerHTML = "<br>Please check at least one box, or click on 'close' below.<br>";
  } else if ( val.length <= 200 ) {
    decksInterestedIn = "";
    if ( medievalCheckbox.checked == true ) { decksInterestedIn = decksInterestedIn + "M"; }
    if ( jungleCheckbox.checked   == true ) { decksInterestedIn = decksInterestedIn + "J"; }
    if ( spaceCheckbox.checked    == true ) { decksInterestedIn = decksInterestedIn + "S"; }
    if ( wackyCheckbox.checked    == true ) { decksInterestedIn = decksInterestedIn + "W"; }
    XMLHTTP_getPage("http://www.persepress.com/ShowInterest.aspx", "e="+val+"&d="+decksInterestedIn);
    messageSpan.innerHTML = "<br>Thank you! Click on the 'close' below now.<br>";
  }
}