javascript - 如何使用表单创建弹出窗口？

Question

下面的代码片段是我的登录表单。我需要的是通过单击菜单中的 Login 链接在弹出窗口中打开此表单。我通过互联网搜索但没有找到相关答案。我知道我应该使用 JavaScript，但我不知道如何编写正确的代码。 我应该使用纯 JS 还是 jQuery？为什么？ 谢谢。

body {
    background: #a7a7a7;
}

.login__form {
	width: 320px;
    padding: 20px;
    background: #fff;
    border-radius: 5px;
    border-top: 5px solid #ff4e50;
    margin: 0 auto;
}

.login__form fieldset{
	border: 0;
}

.login__form h3 {
    text-align: center;
    color: #666;
    font-size: 18px;
    text-transform: uppercase;
    margin-top: 0;
    margin-bottom: 20px;
	font-weight: bold;
    padding: 0;
    margin: 0;
    margin-bottom: 12px;
}

.login__form input {
    width: 100%;
    height: 42px;
    box-sizing: border-box;
    border-radius: 5px;
    border: 1px solid #ccc;
    margin-bottom: 20px;
    font-size: 14px;
    font-family: Montserrat;
    padding: 0 20px 0 50px;
    outline: none;
}

.login__form input#username {
    background: #fff url('http://i.imgur.com/u0XmBmv.png') 20px top no-repeat;
    background-size: 16px 80px;
}

.login__form input#username:focus {
    background: #fff url('http://i.imgur.com/u0XmBmv.png') 20px bottom no-repeat;
    background-size: 16px 80px;
}

.login__form input#password {
    background: #fff url('http://i.imgur.com/Qf83FTt.png') 20px top no-repeat;
    background-size: 16px 80px;
}

.login__form input#password:focus {
    background: #fff url('http://i.imgur.com/Qf83FTt.png') 20px bottom no-repeat;
    background-size: 16px 80px;
}

.login__form input:active, .login__form input:focus {
    border: 1px solid #ff4e50;
}

.login__form input#button {
    width: 100%;
    height: 40px;
    background: #ff4e50;
    box-sizing: border-box;
    border-radius: 5px;
    border: 1px solid #e15960;
    color: #fff;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 14px;
    font-family: Montserrat;
    outline: none;
    cursor: pointer;
    margin: 0;
    padding: 0;
}

.login__form input#button:hover {
    opacity: 0.7;
    filter: alpha(opacity=70);
}

<form name="login" class="login__form">
			<h3>Login</h3>
			<fieldset>
				<input type="text" value="" placeholder="Username" id="username">
				<input type="password" value="" placeholder="Password" id="password">
				<input type="submit" value="Submit" id="button">
			</fieldset>
</form>

Answer 1

您可以使用 jquery UI :

  $(function() {
    $("#dialog").dialog({
      autoOpen: false,
      show: {
        effect: "blind",
        duration: 1000
      },
      hide: {
        effect: "explode",
        duration: 1000
      }
    });

    $("#opener").click(function() {
      $("#dialog").dialog("open");
    });
  });

body {
  background: #a7a7a7;
}
.login__form {
  /*width: 320px;*/
  padding: 20px;
  background: #fff;
  border-radius: 5px;
  border-top: 5px solid #ff4e50;
  margin: 0 auto;
}
.login__form fieldset {
  border: 0;
}
.login__form h3 {
  text-align: center;
  color: #666;
  font-size: 18px;
  text-transform: uppercase;
  margin-top: 0;
  margin-bottom: 20px;
  font-weight: bold;
  padding: 0;
  margin: 0;
  margin-bottom: 12px;
}
.login__form input {
  width: 100%;
  height: 42px;
  box-sizing: border-box;
  border-radius: 5px;
  border: 1px solid #ccc;
  margin-bottom: 20px;
  font-size: 14px;
  font-family: Montserrat;
  padding: 0 20px 0 50px;
  outline: none;
}
.login__form input#username {
  background: #fff url('http://i.imgur.com/u0XmBmv.png') 20px top no-repeat;
  background-size: 16px 80px;
}
.login__form input#username:focus {
  background: #fff url('http://i.imgur.com/u0XmBmv.png') 20px bottom no-repeat;
  background-size: 16px 80px;
}
.login__form input#password {
  background: #fff url('http://i.imgur.com/Qf83FTt.png') 20px top no-repeat;
  background-size: 16px 80px;
}
.login__form input#password:focus {
  background: #fff url('http://i.imgur.com/Qf83FTt.png') 20px bottom no-repeat;
  background-size: 16px 80px;
}
.login__form input:active,
.login__form input:focus {
  border: 1px solid #ff4e50;
}
.login__form input#button {
  width: 100%;
  height: 40px;
  background: #ff4e50;
  box-sizing: border-box;
  border-radius: 5px;
  border: 1px solid #e15960;
  color: #fff;
  font-weight: bold;
  text-transform: uppercase;
  font-size: 14px;
  font-family: Montserrat;
  outline: none;
  cursor: pointer;
  margin: 0;
  padding: 0;
}
.login__form input#button:hover {
  opacity: 0.7;
  filter: alpha(opacity=70);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js"></script>
<div id="dialog">
  <form name="login" class="login__form">
    <h3>Login</h3>
    <fieldset>
      <input type="text" value="" placeholder="Username" id="username">
      <input type="password" value="" placeholder="Password" id="password">
      <input type="submit" value="Submit" id="button">
    </fieldset>
  </form>
</div>
<button id="opener">Log In</button>

当然，您可以修改此代码以满足您的需求。