问题：用selenium+phantomjs 模拟登陆，网页用JavaScript的alert(“登陆成功”)弹出框，但是用switch_to_alert().accept()报错，不可执行命令。

目标代码：<script language="javascript">alert('********************');</script>

显示错误：

File "sy.py", line 112, in <module>
Pop123= Pop_up.text
File "C:\Python27\lib\site-packages\selenium\webdriver\common\alert.py", line 69, in text
return self.driver.execute(Command.GET_ALERT_TEXT)["value"]
File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 308, in execute
self.error_handler.check_response(response)
File "C:\Python27\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 165, in check_response
raise exception_class(value)
selenium.common.exceptions.WebDriverException: Message: Invalid Command Method - {"headers":{"Accept":"application/json","Accept-Encoding":"identity","Connection":"close","Content-Type":"application/json;charset=UTF-8","Host":"127.0.0.1:59198","User-Agent":"Python http auth"},"httpVersion":"1.1","method":"GET","url":"/alert_text","urlParsed":{"anchor":"","query":"","file":"alert_text","directory":"/","path":"/alert_text","relative":"/alert_text","port":"","host":"","password":"","user":"","userInfo":"","authority":"","protocol":"","source":"/alert_text","queryKey":{},"chunks":["alert_text"]},"urlOriginal":"/session/95d315d0-ce94-11e7-8d72-c1b9396af0ea/alert_text"}

搜到的解决方案：

　　 phantomjs是没有界面的，无法j解析动态的JS，所以对alert也是无法直接弹出的，故phantomjs以该函数回调在page在执行过程中的alert事件。

　　python没有对应phentomjs特殊的库，所以需要调用JS。

　　python selenium官方已不再对phentomjs提供支持。现在主打火狐浏览器 和 谷歌浏览器 请尽量更换

一 、python调用Js

　　r = driver.execute_script("return newsJason")

　　print r

二、Js里面的方法 　　　　　　　　　时间较忙未进行测试对错

　　page.onAlert = function(msg) {}

　　driver.execute_script("window.confirm = function(msg) { return true; }");