var onResponse = function(responseText, textStatus, XMLHttpRequest){this;};
var sendMail = function() {
  strEMail = $('#eMail').val();
  strMsg   = $('#msg').val();
    
  $('#eMail_box').load('mail.php', {command : 'sendMail', eMail : strEMail, msg : strMsg}, onResponse);
}

$(document).ready(function() {
  $('#eMail_button').click(function() { 
    $('#eMail_box').load('mail.php', {}, onResponse);
    $('#eMail_box').show('slow');     
  });
});