PHP代码：

<?php
    if(isset($_POST['submit']))
    {
       $sent = mail($to, $subject, $email_message, $headers) ;

       if($sent)
       {
        echo '<script> cleartext(); </script>';
       }

    }
?>

脚本语言：

<script type="text/javascript">

    function cleartext()
    {
         alert(document.getElementById('name').value);
         document.getElementById('name').value = '';
         document.getElementById('email').value = '';
         document.getElementById('phone').value = '';
         document.getElementById('message').value = '';

         alert(document.getElementById('name').value);
    }
</script>

源代码：

<form action="#" method="post" class="margin-bottom" target="hidden" id="contact">
 <div class="row">
      <div class="col-lg-6  col-sm-6">
            <input type="text" placeholder="Your Name*" id="name" name="name" />
      </div>
      <div class="col-lg-6  col-sm-6">
          <input type="text" placeholder="Your Email*" id="email" name="email" />
      </div>
      <div class="col-lg-6 col-sm-6">
           <input type="text" placeholder="Your Phone*" id="phone" maxlength="13" name="phone" />
      </div>
  </div>

<textarea placeholder="Message" id="message" name="message"></textarea>

    <input type="submit" id="clear" name="clear" class="button" value="Clear &nbsp;&nbsp;&nbsp;" onClick="cleartext();">
    <input name="submit" type="submit" class="button" id="submit" onClick="MM_validateForm('name','','R','email','','RisEmail','phone','','RisNum','message','','R');return document.MM_returnValue" value="Submit &nbsp;&nbsp;&nbsp;">

</form>

问题

我想清除所有输入文本发送邮件后提交。在提交我调用PHP从我的PHP代码。但在这一次我不能清除我的输入文本值。当我调用cleartext()方法上清除按钮它的工作正常。如果有人有关于它的想法，所以请帮助我。