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Q>
night 버튼 위에 마우스를 올렸을 때, 배경 색이 회색으로 바뀌도록 만들어봅시다.
A>
<!doctype html>
<html>
<head>
<title>WEB1 - Welcome</title>
<meta charset="utf-8">
</head>
<body>
<h1><a href="index.html">WEB</a></h1>
<input type="button" value="night" onmouseover="
document.querySelector('body').style.background = 'gray';
">
<input type="button" value="day">
<ol>
<li><a href="1.html">HTML</a></li>
<li><a href="2.html">CSS</a></li>
<li><a href="3.html">JavaScript</a></li>
</ol>
<h2>WEB</h2>
<p>The World Wide Web (abbreviated WWW or the Web) is an information space where documents and other web resources
are
identified by Uniform Resource Locators (URLs), interlinked by hypertext links, and can be accessed via the
Internet.[1] English scientist Tim Berners-Lee invented the World Wide Web in 1989. He wrote the first web
browser
computer program in 1990 while employed at CERN in Switzerland.[2][3] The Web browser was released outside of
CERN
in 1991, first to other research institutions starting in January 1991 and to the general public on the Internet
in
August 1991.
</p>
</body>
</html>
https://www.boostcourse.org/cs124
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