tcler's blog --- 其实我是一个程序员
Show me your flowcharts and conceal your tables, and I shall continue to be mystified. Show me your tables, and I won’t usually need your flowcharts; they’ll be obvious.

get/change the useragent(user agent) of browser

get useragent:

my-user-agent.com


change the useragent:

change your user agent: firefox


getting the user agent with JS

getting-the-user-agent-with-javascript