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我是CSS動畫新手，對動畫有特別的瞭解。我的意圖是讓灰色方塊從登錄/註冊部分上方的第一行開始。此刻，我只是漸漸淡入。如果有人能幫上忙，那就太棒了。 請在您自己的瀏覽器中運行代碼，以瞭解它應該如何運行。 P.S.單擊按鈕時，動畫會運行。CSS動畫製作
如果有人能幫上忙，那就太好了。
var regbutton = document.getElementById('Register_Button');
var regpopup = document.getElementById('cover_for_register');
regbutton.onclick = function() {
"use strict";
regpopup.style.display = "block";
}body{
margin: 0px auto;
}
button, input, p, h1, h2, h3, h4, h5, a{ /* State that these particular elements be "fantasy" */
font-family: Tahoma;
}
#home_container{
margin: 0px auto;
}
#home_left_section{
float: left;
height: 100%;
width: 55%;
background:-webkit-linear-gradient(#2aefff, #ffffff);
}
#home_right_section{
float: right;
height: 100%!important;
width: 45%;
box-shadow: 0px 0px 14px #888;
z-index: 10000;
background-color:aliceblue;
}
#home_right_section h1{
padding-bottom: 25px;
padding-top: 25px;
font-size: 60px;
margin: 0px;
text-align: center;
}
#home_right_section h2{
margin: 0px;
}
#home_right_section hr {
margin: 0px;
}
#login_register_container{
display:inline-block;
width: 100%;
}
#login_container{
text-align: center; /* If border is created, width must be changed */
float: left;
padding-right:50px;
padding-left: 30px;
padding-top: 20px;
margin-right: 0px auto;
background-color: aqua;
}
.login_input_fields{
border-radius:5px;
width: 200px;
padding: 5px;
border: 1px solid #bfbfbf;
font-size: 15px;
}
.register_popup_foot{
}
#register_container{
width: 50%;
float: right;
margin: 0px auto;
text-align:left;
}
#cover_for_register{
display: none;
position:fixed;
height: 52%;
width: 100%;
background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
-webkit-animation-name: animateone;
-webkit-animation-duration: 1s;
}
@-webkit-keyframes animateone {
from {min-height:200px; opacity:0}
}
#Register_Button{
z-index: 10000;
background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
width:100px;
height: 50px;
color: white;
text-align: center;
margin-top: 80px;
-moz-border-radius-bottomright: 10px;
\t border-bottom-right-radius: 10px;
\t -moz-border-radius-bottomleft: 10px;
\t border-bottom-left-radius: 10px;
-moz-border-radius-topright: 10px;
\t border-top-right-radius: 10px;
\t -moz-border-radius-topleft: 10px;
\t border-top-left-radius: 10px;
}
#Register_Button_Container{
width: 50%;
float: right;
margin: 0px auto;
text-align:center;
background-color: aqua;
height: 217px;
}<html>
<body>
<head>
<title>Home</title>
<link rel="stylesheet" href="PTrainMeCSS.css">
<meta name="viewpoint" content="width=deive-width" />
<script type="text/javascript" src="PTrainMeJavascript.js"></script>
</head>
<div id="home_container">
<section id="home_left_section">
<h1></h1>
</section>
<section id="home_right_section">
<h1>GetFit</h1>
<hr />
<h3 id="welcome_text">Here you can find whatever service you may want throughout the fitness industry</h3>
<hr />
<div id="login_register_container">
<section id="login_container">
<h2>Login</h2>
<form>
<br />
<input class="login_input_fields" type="text" name="Username" maxlength="10" placeholder="Username/E-Mail" /><br /><br />
<input class="login_input_fields" type="password" name="Password" maxlength="20" placeholder="Password" />
<br />
<br />
<input type="submit" value="Login" />
</form>
<footer class="register_popup_foot">
<a class="register_loginform_foot_text" href="Forgot Password.html">Reset Password</a>
<br />
</footer>
</section>
<div id="Register_Button_Container">
<section>
<button id="Register_Button">Register</button>
</section>
</div>
<div id="cover_for_register">
<section id="register_container">
<h2>Register</h2>
<form>
<br />
<input class="login_input_fields" type="text" name="Username" maxlength="10" placeholder="Username"/>
<br /><br />
<input class="login_input_fields" type="text" name="E-Mail" placeholder="E-Mail"/>
<br /><br />
<input class="login_input_fields" type="password" name="Password" placeholder="Password"/>
<br /><br />
<label>Age:</label>
\t \t \t \t <br /> <select type="option" name="Age">
\t \t \t \t <option></option>
\t \t \t \t <option>13</option>
\t \t \t \t <option>14</option>
\t \t \t \t <option>15</option>
\t \t \t \t <option>16</option>
\t \t \t \t <option>17</option>
\t \t \t \t <option>18</option>
\t \t \t \t </select><br /><br />
Security Question: <br /><select type="select" name="Security Question">
\t \t \t \t <option>Please select one.</option>
\t \t \t \t <option>What was my school teachers first name?</option>
\t \t \t \t <option>Whats my favourite chip flavour?</option>
\t \t \t \t <option>What type was my first car?</option>
\t \t \t \t <option>What was the name of my first school?</option>
\t \t \t \t <option>What are my parents names?</option>
\t \t \t \t <option>How many siblings do i have?</option>
\t \t \t \t <option>What was the address of my first house?</option>
\t \t \t \t </select><br /> <br />
\t \t \t \t Answer: <br /> <input type="text" name="Answer">
\t \t \t \t <a href="">Why</a><br /><br />
\t \t \t \t <input type="submit" value="Submit">
</form>
</section>
</div>
</div>
</section>
</div>
<script type="text/javascript" src="PTrainMeJavascript.js"></script>
</body>
</html>