Event.observe(window, 'load', contact, false);
function contact(){
Event.observe('submit', 'click', send, false);
function send(){
     var url = 'sendmail.php';
     var pars = 'address='+escape($F('address'))+'&subject='+escape($F('subject'))+'&body='+escape($F('body'));
     var target = 'return';
     var myAjax = new Ajax.Updater(target, url, {method: 'get', parameters: pars});
}
}