JS正则表达式

/(?:https|http|ftp|rtsp|mms):\/\/.+\/[\w]+\.[\w]+/

(https?|ftp|rtsp|mms):\/\/[\w-]+(\.[\w-]*)*(\/\w*)*\w*\.\w*

(https|http|ftp|rtsp|mms).*\....

^[a-z]{3,5}://.*\.\w{3,5}