我想使用 CSS-PHP 将一个图像覆盖在另一个图像上。请参阅下面的 HTML 和 CSS 片段并给出明智的建议：图像出现在该部门的标题部分：j_logo.jpg 和 MMPHero3.jpg。其中前者应该是透明的并且在左侧容器中，而后者应该占据整个标题区域。
<body>
<div id="container">
<div id="header">
<div id="header-left-container">
<img src="j_logo.jpg" alt="jubilant"/>
</div>
<div id="header-right-container">
<img src="MMPHero3.jpg" alt="drug"/>
</div>
</div>
<div id="content"> Sidebar <p> </p>
<div class="form">
<p>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
<p>Enter Drug Name </p>
<input type="text" name="drugName" value="<?php echo (isset($_POST['drugName']) ? $_POST['drugName'] : '') ?>">
<!--To retain search query after click added value="<?php echo (isset($_POST['drugName']) ? $_POST['drugName'] : '') ?>*/-->
<!-- This is commenting style in HTML -->
<p><input type="submit" value="search"></p>
</form>
</div>
</div>
<div id="sidebar"> Body
</div>
<div id="footer"> </div>
</body>
</html>
CSS样式表如下：
body {background: #ffffff;}
a {color: #2b2bf6;}
h1 {font-size: 30px;}
#container
{width:1000px;
margin: 0 auto;
background: #dddddd;}
#header
{height: 150px;
margin: 0px;
padding: 0px;
background: #FFFFA3;}
#header-right-container img
{border:none;
width:80%;
height:150px;
float: right;}
#header-left-container
{width:20%;
float: left}
#header-left-container img
{border:none;
width:100%;
height:150px auto;
float: left;}
#sidebar
{
position:relative;
width: 80%;
height: 400px;
float:right;
background: #FFFFA3; ;}
#content
{
position:relative;
width: 20%;
height: 400px;
float: left;
background: #f0e811;;}
#footer
{width: 100%;
height: 70px;
float: left;
background: #000000;
div.result
{
width:88%;
padding:5%;
border:5px solid gray;
margin:5px;
align:center;
}
div.form
{
width:180px;
padding:5%;
border:5px solid gray;
margin:50px;
align:center;
float:right;
}
table, td, th
{
border:0.5px solid blue;
align:center
}
th
{
background-color:#3886FC;
color:white;
}