abstract：<html><form> <input id="email" type="text"></form><p></p></html><script> $.post('check.p
<html>
<form>
<input id="email" type="text">
</form>
<p></p>
</html>
<script>
$.post('check.php',$('form).serialize(),function(){
})
</script>
通过ajax进行判断
Correcting teacher：查无此人Correction time：2019-04-27 17:39:02
Teacher's summary：呃，就写了个外部？内部代码不写点吗？继续加油