html简单示例如下:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js修改文档样式</title>
</head>
<body>
<div >这是一个盒子</div>
<script type="text/javascript">
var div = ("div");//获取元素id
//方式一:用cssText
='width:600px;height:250px;border:1px red solid;
text-align: center;line-height: 250px;';
//方式二:用setProperty()
('width','700px');
('height','300px');
('line-height','300px');
('background','#f00');
('color','#fff');
('border','1px solid blue');
('text-align','center');
//方式三:使用css属性对应的style属性
= "800px";
= "250px";
= "250px";
= "#000";
= "#fff";
= "1px solid #111";
= "center";
</script>
</body>
</html>