Javascript Regex: How to detect if a url is of the form http://<any string without a dot>.one.two.com?

Question

How can I use regex in a JavaScript function to return true if the url is of the form:

http://<any string without a dot>.one.two.com

and false otherwise?

for example it would return true for the following:

http://helloworld.one.two.com , http://poop.one.two.com , etc.

for example, it would return false for

http://rawr.zero.one.two.com , http://two.com , etc.

Thanks!

Answer 1

/^http:\\/\\/[^.]*\\.one\\.two\\.com$/

Answer 2

/^http:\/\/[^.]+\.one\.two\.com/

Answer 3

/^http:\/\/[^\.]+\.one\.two\.com$/

末尾的$是指示性的，否则http：//something.one.two.com.blah也将匹配。