Javascript中button按钮的onclick()事件传递参数

<input type="button" name="modify" onclick="aaa()" value="修改" />

function aaa(){
 var u_id = '你的id值';
 location.href = modifyUser.php？user=u_id
}

方法二

<input type="button" name="modify" onclick="var u_id = document.getElementById('u_id').value;location.href='modifyUser.php？user=u_id';" value="修改" />