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Validation for domain name & IPAddress

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Oct 22.2003

Hi
Can any one please tell how to validate for domain name ([url]www.somename.com[/url]) and IP Address (111.333.99.34)

Conditions for IP Address is

  • 1.

    only four “.” are allowed & is a must


  • 2.

    numbers should not cross 255


  • 3.

    no other charecters other than “.” is allowed

    shara

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    7 Comments(s) ↴

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    @CharlesOct 22.2003 — [font=monospace]<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"

    "http://www.w3.org/TR/html4/strict.dtd">

    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">

    <meta name="Content-Script-Type" content="text/javascript">

    <title>Example</title>

    <style type="text/css">

    <!--

    label {display:block; margin:1em 0em}

    input {display:block}

    -->

    </style>

    <script type="text/javascript">

    <!--

    String.prototype.isIPAddress = function () {if (!this.match(/^(d+).(d+).(d+).(d+)$/)) return false; for (var i=1; i<=4; i++) {if (RegExp['$' + i] > 255) return false}; return true}

    // -->

    </script>

    <form action="">

    <div>

    <label>IP Address<input type="text" onchange="if (!this.value.isIPAddress()) {alert('That does not appear to be a valid IP Address.'); this.value=''; this.focus()}"></label>

    <button type="submit">Submit</button>

    </div>

    </form>[/font]
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    @shanuraguauthorOct 23.2003 — Thanks Charles

    But how to validate Domain name ie www.wesitename.com

    shara
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    @CharlesOct 23.2003 — [font=georgia]If you can tell me what constitutes a valid domain name then I can write your script.[/font]
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    @shanuraguauthorOct 23.2003 — It is nothing but any web site address, it should be in

    www.websitename.com (com/co/org...) format

    shara
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    @CharlesOct 23.2003 — [i]Originally posted by shanuragu [/i]

    [B]It is nothing but any web site address, it should be in

    www.websitename.com (com/co/org...) format



    shara [/B]    [/QUOTE]    [font=georgia]We need a lot more to go on than that. What characters are allowed? What are the length restrictions? What about case? Do you want to require the tripple w? What about the country codes?[/font]
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    @shanuraguauthorOct 23.2003 — Sorry!!

    here are the conditions :

    format is www.sitename.com

  • 1. two "." are must

  • 2. www is a must

  • 3. last word should always be more than one letter (co,com...) & only charecters

  • 4. Website name can be alphanumeric, no limit for wesite name length
  • 5. It should start with www only



    • shara
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    @AdamGundryOct 23.2003 — I think this should do it:

    String.prototype.isDomainName = function () {return this.match(/^www.w{2,}.[a-zA-Z]{2,}$/)}

    Adam
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