<form action="" method="post">
    <input type="submit" value="Send details to embassy" />
    <input type="hidden" name="button_pressed" value="1" />
</form>
 
<?PHP
 
if(isset($_POST['button_pressed']))
{
    $to      = 'nobody@example.com';
    $subject = 'the subject';
    $message = 'hello';
    $headers = 'From: webmaster@example.com' . "\r\n" .
        'Reply-To: webmaster@example.com' . "\r\n" .
        'X-Mailer: PHP/' . PHPversion();
 
    mail($to,$subject,$message,$headers);
 
    echo 'Email Sent.';
}
 
?>

UPDATE

这可以用作Javascript函数来调用mail.PHP页面并发送电子邮件而无需重新加载页面.

function sendemail()
{
    var url = '/mail.PHP';
 
    new Ajax.Request(url,{
            onComplete:function(transport)
            {
                var Feedback = transport.responseText.evalJSON();
                if(Feedback.result==0)
                    alert('There was a problem sending the email,please try again.');
            }
        });
 
}

你需要Prototype这个方法：http://www.prototypejs.org/api/ajax/request

我没有测试过这个,但希望它应该是正确的.