Question

hi i have a jquery validation method for URL validation ,

currently i use a validation rule like this

 var urlregex = new RegExp("^(http|https|ftp)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$");
 var urltest=urlregex.test(url);

this validates

1 . http://abcd to true .

2 . http://abcd.com to true .

3 . http://www.abcd to true .

4 . http://www.abcd.com to true .

i want to be true only the 4 th URL .

i want a validation that needs

www with http:// (or like https:// , ftp://) and to end with .com (or like .org , .lk)

only URL’s like this should validate true

http://www.abcd.com
http://www.efgh.lk

please help . thanks in advance ……………………

Answer 1

Try this regex:

^(http|https|ftp)\:\/\/www\.[-0-9a-zA-Z]+\.[a-zA-Z]{2,3}$

Update
Regex object initialization + unlimited number of subdomains + upto 4 characters in root domain:

var urlregex = new RegExp(/^(http|https|ftp)\:\/\/www\.([-0-9a-zA-Z]+\.)+[a-zA-Z]{2,4}$/);