jQuery – validate hosname (without domain)

Validating a URL hostname to allow only alpha-numerics and hyphen in the middle.

1. Only allowing alpha numerics and hyphen
2. Hyphen can be in the middle of the string. Not in the beginning or end
3. At least 2 character for hostname

alert($( '[name="eval|hostname"]' ).val().match(/^[a-z0-9]+[a-z0-9-]*[a-z0-9]+$/g));
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