鼠標點擊顏色塊，指定區域背景顏色更換
完整代碼：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style type="text/css">
div, ul {
margin: 0;
padding: 0;
}
.first {
height: 50px;
/*outline: 1px solid red;*/
}
.second {
height: 400px;
outline: 1px solid gray;
}
#change {
height: 370px;
}
.first>div {
float: right;
width: 30px;
height: 30px;
/*outline: 1px solid red;*/
margin: 5px;
margin-top: 9px;
}
.first>div:nth-child(1) {
background-color: pink;
}
.first>div:nth-child(2) {
background-color: blue;
}
.first>div:nth-child(3) {
background-color: orange;
}
.second>div:first-child {
height: 40px;
/*outline: 1px solid red;*/
background-color: gray;
}
ul {
list-style-type: none;
}
</style>
</head>
<body>
<div class="first">
<div id="pink" οnclick="document.getElementById('change').style.backgroundColor='pink'"></div>
<div id="blue" οnclick="document.getElementById('change').style.backgroundColor='blue'"></div>
<div id="orange" οnclick="document.getElementById('change').style.backgroundColor='orange'"></div>
</div>
<div class="second">
<div></div>
<div id="change">
<ul>
<li>123</li>
<li>456</li>
<li>789</li>
<li>123</li>
</ul>
</div>
</div>
</body>
<script type="text/javascript">
</script>
</html>