日期:2014-05-16 浏览次数:20415 次
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>无标题文档</title>
<style>*{margin:0; padding:0;}</style>
</head>
<body>
<div style="width:100px; height:200px; background:#090;"><div id="s" style=" width:20%; height:200px;"></div></div>
<input type="button" id="btn" value="click me" />
<script>
document.getElementById('btn').onclick = function(){
document.getElementById('s').style.background = 'red';
};
</script>
</body>
</html>
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