python selenium滚动到顶部与底部

#coding=utf-8
 2 from selenium import webdriver
 3 
 4 #滚动到浏览器顶部
 5 js_top = "var q=document.documentElement.scrollTop=0"
 6 
 7 #滚动到浏览器底部
 8 js_bottom = "var q=document.documentElement.scrollTop=10000"
 9 js_bottom2 = "window.scrollTo(0,document.body.scrollHeight)"
10 
11 driver = webdriver.Chrome()
12 driver.get(url)
13 driver.execute_script(js_bottom)
14 driver.execute_script(js_top)
15 driver.close()