selenium 执行js代码

from time import sleep

js = '''
alist = document.getElementsByClassName("ui-page-next");
alist = alist[0];
alist.click();
'''

from selenium import  webdriver

br = webdriver.Chrome()
br.get("https://list.tmall.com/search_product.htm?q=iphone&type=p&vmarket=&spm=875.7931836%2FB.a2227oh.d100&from=mallfp..pc_1_searchbutton")
sleep(2)
br.execute_script(js)