<!DOCTYPE?html>
<html?lang="en">
<head>
????<meta?charset="UTF-8">
????<title>表單驗證</title>
????<style>
????????.title{
????????????font-weight:?bold;
????????????font-size:18px;
????????}
????????.names{
????????????width:358px;
????????????height:42px;
????????????margin-left:38px;
????????????-webkit-border-radius:5px;
????????????-moz-border-radius:5px;
????????????border-radius:5px;
????????}
????????.btn{
????????????width:78px;
????????????height:42px;
????????????margin-left:15px;
????????????background:?rgb(46,122,184);
????????????color:?#fff;
????????????font-size:18px;
????????????font-weight:?bold;
????????????outline:?none;
????????????border:0;
????????????border-radius:?5px;
????????}
????????.prompt{
????????????margin-left:78px;
????????????font-size:16px;
????????????color:?#ccc;
????????}
????</style>
</head>
<body>
????<form?action="#">
????????<p>
????????????<label?for="names"?class="title">名稱</label>
????????????<input?type="text"?class="names"?id="names"?name="user_name">
????????????<button?type="submit"?class="btn">驗證</button>
????????</p>
????????<p?class="prompt">必填,長度為4~16個字符</p>
????</form>
</body>
<script>
????var?names=document.getElementById("names");
????
</script>
</html>
為什么我得不到input的value值？
19990000
2017-10-03 21:07:29
