【例】
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<p id="p">改变文字样式</p>
</body>
<script>
function t(){
document.getElementById("p").style.fontWeight = "bold";
}
document.getElementById("p").onclick = t;
</script>
</html>
或
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<p id="p">改变文字样式</p>
</body>
<script>
document.getElementById("p").onclick = function(){
document.getElementById("p").style.fontWeight = "bold";
}
</script>
</html>
或
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<p id="p">改变文字样式</p>
</body>
<script>
document.getElementById("p").onclick = function(){
this.style.fontWeight = "bold";
}
</script>
</html>
Javascript 笔记与总结（2-15）结构、样式、行为分离
原文：http://www.cnblogs.com/dee0912/p/4471985.html