问题是具有id的element的值total_results在页面加载后发生变化，首先包含117，然后变为44。
相反，这是一种更可靠的方法。它逐页处理，直到没有剩余的页面了：
from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
driver = webdriver.Firefox()
url = 'http://www.nice.org.uk/Search.do?searchText=bevacizumab&newsearch=true#/search/?searchText=bevacizumab&mode=&staticTitle=false&SEARCHTYPE_all2=true&SEARCHTYPE_all1=&SEARCHTYPE=GUIDANCE&TOPICLVL0_all2=true&TOPICLVL0_all1=&HIDEFILTER=TOPICLVL1&HIDEFILTER=TOPICLVL2&TREATMENTS_all2=true&TREATMENTS_all1=&GUIDANCETYPE_all2=true&GUIDANCETYPE_all1=&STATUS_all2=true&STATUS_all1=&HIDEFILTER=EGAPREFERENCE&HIDEFILTER=TOPICLVL3&DATEFILTER_ALL=ALL&DATEFILTER_PREV=ALL&custom_date_from=&custom_date_to=11-06-2014&PAGINATIONURL=%2FSearch.do%3FsearchText%40%40bevacizumab%26newsearch%40%40true%26page%40%40&SORTORDER=BESTMATCH'
driver.get(url)
page_number = 1
while True:
try:
link = driver.find_element_by_link_text(str(page_number))
except NoSuchElementException:
break
link.click()
print driver.current_url
page_number += 1
基本上，这里的想法是获取下一页链接，直到没有此类链接（NoSuchElementException将被抛出）。请注意，它适用于任意数量的页面和结果。
它打印：
http://www.nice.org.uk/Search.do?searchText=bevacizumab&newsearch=true&page=1
http://www.nice.org.uk/Search.do?searchText=bevacizumab&newsearch=true&page=2#showfilter
http://www.nice.org.uk/Search.do?searchText=bevacizumab&newsearch=true&page=3#showfilter
http://www.nice.org.uk/Search.do?searchText=bevacizumab&newsearch=true&page=4#showfilter
http://www.nice.org.uk/Search.do?searchText=bevacizumab&newsearch=true&page=5#showfilter
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