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POJavascript Function to enter only alphabets on keypress
 

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  1. POJavascript Function to enter only alphabets on keypress
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    <p>I want to enter only character values inside a <code>&lt;textarea&gt;</code> and numeric values in another. I have been able to make a JavaScript function which only allows numeric values to be entered in the <code>&lt;textarea&gt;</code> using <code>onkeypress</code>. This works in Firefox and Chrome.</p> <p>For alphabets I am creating another JavaScript function using <code>windows.event</code> property. Only problem is this works only in Chrome and not in Firefox.</p> <p>I want to know how to allow only alphabets to be entered using <code>onkeypress</code> event as used for entering only numeric values?</p> <p><div class="snippet" data-lang="js" data-hide="false"> <div class="snippet-code"> <pre class="snippet-code-js lang-js prettyprint-override"><code>function isNumberKey(evt){ &lt;!--Function to accept only numeric values--&gt; //var e = evt || window.event; var charCode = (evt.which) ? evt.which : evt.keyCode if (charCode != 46 &amp;&amp; charCode &gt; 31 &amp;&amp; (charCode &lt; 48 || charCode &gt; 57)) return false; return true; } function ValidateAlpha(evt) { var keyCode = (evt.which) ? evt.which : evt.keyCode if ((keyCode &lt; 65 || keyCode &gt; 90) &amp;&amp; (keyCode &lt; 97 || keyCode &gt; 123) &amp;&amp; keyCode != 32) return false; return true; }</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;label for="cname" class="label"&gt;The Risk Cluster Name&lt;/label&gt; &lt;textarea id="cname" rows="1px" cols="20px" style="resize:none" placeholder="Cluster Name" onKeyPress="return ValidateAlpha(event);"&gt;&lt;/textarea&gt; &lt;br&gt; &lt;label for="cnum"&gt;Risk Cluster Number:&lt;/label&gt; &lt;textarea id="cmun" rows="1px" cols="12px" style="resize:none" placeholder="Cluster Number" onkeypress="return isNumberKey(event)"&gt;&lt;/textarea&gt;</code></pre> </div> </div> </p>
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    1. CO_"only character values"_ - Do you mean only letters? Remember that validating on keypress is not sufficient, because the user may copy/paste or drag'n'drop without causing a keypress event.
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    2. COuse regular expressions instead?
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    3. COHere are some examples of characters: "1", "&", "a", ")", "W". You mean _letters._
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