可以用cmd命令操作切换,语法也很简单,参考
http://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=1&tn=monline_4_dg&wd=cmd%20%E5%8F%8C%E7%BD%91%E5%8D%A1%20%E5%88%87%E6%8D%A2&rsv_pq=969383b900010499&rsv_t=1107IRrciVNbuRTgvwIN0LUrs46mBvl3pvnfq8WunjgV56BzbsTupTX2026DCsQlk8t2&rsv_enter=1&rsv_sug3=5&rsv_sug1=1&rsv_sug2=0&inputT=5633&rsv_sug4=5944&rsv_sug=1