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    <p>First off - I'd recommend the email validator RegEx from Hexillion: <a href="http://hexillion.com/samples/" rel="noreferrer">http://hexillion.com/samples/</a></p> <p>It's pretty comprehensive - :</p> <pre><code>^(?:[\w\!\#\$\%\&amp;\'\*\+\-\/\=\?\^\`\{\|\}\~]+\.)*[\w\!\#\$\%\&amp;\'\*\+\-\/\=\?\^\`\{\|\}\~]+@(?:(?:(?:[a-zA-Z0-9](?:[a-zA-Z0-9\-](?!\.)){0,61}[a-zA-Z0-9]?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9\-](?!$)){0,61}[a-zA-Z0-9]?)|(?:\[(?:(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\.){3}(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\]))$ </code></pre> <p>I think you want a function in your JavaScript like:</p> <pre><code>function validateEmail(sEmail) { var reEmail = /^(?:[\w\!\#\$\%\&amp;\'\*\+\-\/\=\?\^\`\{\|\}\~]+\.)*[\w\!\#\$\%\&amp;\'\*\+\-\/\=\?\^\`\{\|\}\~]+@(?:(?:(?:[a-zA-Z0-9](?:[a-zA-Z0-9\-](?!\.)){0,61}[a-zA-Z0-9]?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9\-](?!$)){0,61}[a-zA-Z0-9]?)|(?:\[(?:(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\.){3}(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\]))$/; if(!sEmail.match(reEmail)) { alert("Invalid email address"); return false; } return true; } </code></pre> <p>In the HTML input you need to trigger the event with an onblur - the easy way to do this is to simply add something like:</p> <pre><code>&lt;input type="text" name="email" onblur="validateEmail(this.value);" /&gt; </code></pre> <p>Of course that's lacking some sanity checks and won't do domain verification (that has to be done server side) - but it should give you a pretty solid JS email format verifier.</p> <p>Note: I tend to use the <code>match()</code> string method rather than the <code>test()</code> RegExp method but it <em>shouldn't</em> make any difference.</p>
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    1. POValidate email address textbox using JavaScript
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    1. USCD001
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      1. VTUpMod
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    1. COThank you CD001....It's working.....
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      1. USRamasani Indrashaker
    2. COHi CD001, What is the best RegEx for website validation?
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      1. USRamasani Indrashaker
    3. CODomain name validation? Or full URI validation? I'm currently using something that looks like this for full URI validation (note: **not** tested to destruction yet and I limited the scope to the http, https and ftp protocols) `/^(?:(?:(http|https|ftp|[a-z]+)\:\/\/))?((?:(?:[a-zA-Z0-9](?:[a-zA-Z0-9\-](?!\.)){0,61}[a-zA-Z0-9]?)\.?)+)\.([a-zA-Z]{2,6})(\/[a-zA-Z0-9\-\=\:\;\@\&\+\%\,\.\!\~\'\(\)\/]+)*\/?(?:\?([^#]+))?(?:\#(.+))?$/` but if it's just Domain validation you're after, again there's a good one on http://hexillion.com/samples/
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