a.接受警告信息
1 alert=driver.switch_to_alert() #将焦点聚集到弹框上 2 alert.accept()
b.得到文本信息打印
1 alert=driver.switch_to_alert() 2 print alert.text()
c.取消对话框
1 alert=driver.switch_to_alert() 2 alert.dismiss()
d.输入值
1 alert=driver.switch_to_alert() 2 alert.send_keys("***")