<!DOCTYPE HTML>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body> <a href="http://www.baidu.com">百度</a> <a href="http://www.qq.com" onclick = "return f1()">腾讯</a> <a href="http://www.qq.com" onclick="javascript:return confirm('确认要删除吗？')">删除</a> <form action="http://www.taobao.com" method="post" >
用户名: <input type="text" name="uesrname" />
<input type="submit" value="提交" />
</form> <script type="text/javascript">
function f1(){
console.log('not');
return false;
}
var a = document.getElementsByTagName('a')[0];
a.onclick = function(){
console.log('NOT---A');
return false;
} var forms = document.getElementsByTagName('form')[0];
/* W3C浏览器下的 */
/*
forms.addEventListener('submit',function(evt){
console.log('not----form');
evt.preventDefault();
});
*/
/* IE浏览器下的 */
forms.attachEvent('onsubmit',function(){
console.log( '表单提交了' );
window.event.returnValue = false;
}) </script>
</body>
</html>