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copied!<p>If you want to stick partially to your code a quick fix could simply use these:</p> <p><code>"^((https?\\://www\\.)|(www\\.))[A-Za-z0-9_\\-]+\\.[A-Za-z0-9_\\-\\%\\&\\?\\.\\=\\+]+$"</code> (accepts "<a href="http://www">http://www</a>...." and "www...")</p> <p>or</p> <p><code>"^(https?\\://www\\.)[A-Za-z0-9_\\-]+\\.[A-Za-z0-9_\\-\\%\\&\\?\\.\\=\\+]+$"</code> (accepts only "<a href="http://www">http://www</a>...." and NOT "www...")</p> <p><strong>Neither ones of the above accepts a domain without "www".</strong></p> <p>Anyway your code (and also the adjusted code I placed above) is WRONG because they would both validate ok domains like these:</p> <ul> <li><a href="http://www.dom_ain.com" rel="nofollow noreferrer">http://www.dom_ain.com</a></li> <li><a href="http://www.-domain.com" rel="nofollow noreferrer">http://www.-domain.com</a></li> <li><a href="http://www.subdomain.domain..gee%%%==all-crap-still-ok" rel="nofollow noreferrer">http://www.subdomain.domain..gee%%%==all-crap-still-ok</a></li> </ul> <p>Your regex would also accept a crap like this:</p> <ul> <li>cheers://www...</li> </ul> <p>To validate <strong>just the domain part</strong> (<em>forcing www to be entered</em>) you can use this:</p> <pre><code>var URLReg = /^((https?\://wwww\.)|(www\.))([a-z0-9]([a-z0-9]|(\-[a-z0-9]))*\.)+[a-z]+$/i; </code></pre> <p>This one won't validate ok crap like:</p> <ul> <li><a href="http://www.dom_ain.com" rel="nofollow noreferrer">http://www.dom_ain.com</a></li> <li><a href="http://www.-domain.com" rel="nofollow noreferrer">http://www.-domain.com</a></li> </ul> <p>BTW: It would validate also <a href="http://www.domain.com.com" rel="nofollow noreferrer">http://www.domain.com.com</a> but this is not an error because a subdomain url could be like: <a href="http://www.subdomain.domain.com" rel="nofollow noreferrer">http://www.subdomain.domain.com</a> and it's valid! And there is almost no way (or at least no operatively easy way) to <strong>validate for proper domain tld</strong> with a regex because you would have to <strong>write inline into your regex all possible domain tlds ONE BY ONE</strong> like this:</p> <pre><code>var URLReg = /^((https?\://wwww\.)|(www\.))([a-z0-9]([a-z0-9]|(\-[a-z0-9]))*\.)+(com|it|net|uk|de)$/i; </code></pre> <p>(this last one for instance would validate only domain ending with .com/.net/.de/.it/.co.uk) <strong>New tlds always come out</strong>, so you would have to adjust you regex everytimne a new tld comes out, that's odd!</p> <hr> <p>In order to validate also the remaining part of an url you could add the remainig part at the end of the regex:</p> <p><code>var URLReg = /^((https?\://wwww\.)|(www\.))([a-z0-9]([a-z0-9]|(\-[a-z0-9]))*\.)+[a-z]+(\/[a-z0-9_\-\%\&\?\.\=\+]*)*$/i</code>;</p> <p>It's still not perfect because somone could enter:</p> <p><a href="http://www.domain.com/????hello" rel="nofollow noreferrer">http://www.domain.com/????hello</a></p> <p>and it would validate ok, but now I'm tired, sorry! :)</p>

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