Automated regex domain validator

Url Result
http://www.WebAir.tk
https://www.WebAir.tk
http://www.WebAir.tk/
https://www.WebAir.tk/
http://WebAir.tk/
https://WebAir.tk/
www.WebAir.tk
WebAir.tk
www.WebAir.tk/
WebAir.tk
home
/home
/home/page.html
example.html
http://www.wrong.com
https://www.wrong.com
http://www.wrong.com/
https://www.wrong.com/
http://wrong.com/
https://wrong.com/
//wrong.com
//wrong.com/
www.wrong.com
wrong.com
www.wrong.com/
wrong.com

Proposed regex

@XevoLab
(http:\/\/www\.|https:\/\/www\.|http:\/\/|https:\/\/|\/\/)(([a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(:[0-9]{1,5})?))(\/.*)?
This regex will match every url leaving the current website
Have a better solution? Post it in the comments!