python下使用selenium怎么才能控制浏览器加载某个元素

想指定加载某个元素，直接向服务器发送对应的请求就行了。请求的网址和参数要抓包获取。
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Author: LoveNight
# @Date: 2015-12-01 12:12:05

import requests
import json
import re

url = r'http://xxx'

resData = requests.get(url).text
jsonStr = re.findall(r'fetchJSON_comment98vv1851\((.*?)\);', resData)[0]
data = json.loads(jsonStr)
summary = data["productCommentSummary"]
print("全部评价", summary["commentCount"], "好评", summary["goodCount"],
"中评", summary["generalCount"], "差评", summary["poorCount"],
"有图片的评价", summary["showCount"])
print("第一条:")
first = data["comments"][0]
print("评论:", first["content"])
print("时间：", first["creationTime"])
print("购买信息", first["productSize"])
print("回复：", first["replyCount"])
print("赞：", first["usefulVoteCount"])