隐藏真实的网页地址
例如，加入google广告的链接为：Ϊ
http://pagead2.googlesyndication.com/pagead/iclk?sa=l&num=0&
client=ca-ref-pub-7468494149378849&adurl=https://adwords.google.com/
select/main%3Fhl%3Dzh_CN%26ai%3DBmkF0dQKCRc6PGZ3OoQLB7PTQDJTmohWA25v-
AcWNtwEAEAEgx4jlBEDsEEibOVD6oLCaAmCdodaBuAWgAci8p_0DsgEJZWV1cmwuY29tyAEB2g
EcaHR0cDovL2VldXJsLmNvbS9zYW1wbGVzLmh0bYACAZUCBzdICqgDAw&ai=BYkfUdQKCRc6
PGZ3OoQLB7PTQDJTmohWA25v-AcWNtwEAEAEgx4jlBEDsEEibOVD8nY6XBGCdodaBuAWg
Aci8p_0DsgEJZWV1cmwuY29tyAEB2gEcaHR0cDovL2VldXJsLmNvbS9zYW1wbGV
zLmh0bYACAZUCBzdICqgDAw
将其简化为：
http://eeurl.com/g
将该地址告诉朋友，对方就不知道该链接是一条google的广告链接了。
