JavaScript——取消默认事件
*举例：取消a链接跳转
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><title>取消默认事件</title>
</head>
<style>.div1 {width: 300px;height: 300px;background: red;}.div2 {width: 100px;height: 100px;background: yellow;}
</style><body><a href="http://www/baidu.com" id="newA">baidu </a>
</body>
<script>newA.onclick = function(e) {if (e.preventDefault) {e.preventDefault();} else {e.returnValue = false;}}
</script></html>