selenium link 怎么定位某一页面上很多link 并验证

需求：打开某个页面，该页面有很多静态链接，需要校验这些link是否正确（能正常打开不显示404或者其他提示信息即可）。这些link会定期更新。
自己写的代码：
        # link to the first sponsor link in the sidebar（用xpath定位页面的link区域，不止一个link）
        link_xpath = "div[2]/div[2]/div[2]/div/div/h1"
                
        # selenium doesn't support opening links in a new window. So will open the url directly.
        # first get the url
        url = sel.get_attribute(link_xpath + "/@href")
        # then open the page
        sel.open(url)
       # make sure we are not seeing an error
        self.assertTrue(sel.get_title().find(u"500内部服务器错误") < 0)
运行总报错：

File "d:\daodao\dealhome.py", line 25, in test_untitled
   url = sel.get_attribute(link_xpath + "/@href")
File "C:\Python26\lib\site-packages\selenium-2.0_dev_9341-py2.6.egg\selenium\s
lenium\selenium.py", line 1339, in get_attribute
   return self.get_string("getAttribute", [attributeLocator,])
File "C:\Python26\lib\site-packages\selenium-2.0_dev_9341-py2.6.egg\selenium\s
lenium\selenium.py", line 216, in get_string
   result = self.do_command(verb, args)
File "C:\Python26\lib\site-packages\selenium-2.0_dev_9341-py2.6.egg\selenium\s
lenium\selenium.py", line 212, in do_command
   raise Exception, data
xception: ERROR: Element /html/body/div[2]/div[2]/div[2]/div/div/h1/ not found

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个人分析，我感觉是xpath定位有问题，各位大侠帮忙看看，感谢