<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<script>
$(function(){
$('body').css('background-color', 'red');
});
</script>
<body>안녕하세요</body>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
<script>
$(function() {
$("#hello").css("background","gold");
$("input[type='button']")
.css("border","solid 3px red")
.css("background","pink");
});
</script>
</head>
<body>
<div id="hello">안녕</div>
<input type="button" value="친구들 버튼" />
</body>
</html>
