​x
 
<!DOCTYPE html>
<html>
<head>
<script src="/jquery/jquery.min.js"></script>
</head>
<body>
​
<p id="demo">JavaScript 能够修改 HTML 元素的样式。</p>
​
<script>
$(document).ready(function() {
  var myElement = $("#demo");
  myElement.css("font-size","35px");
});
</script>
​
</body>
</html>
​