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validation on textarea to allow only characters no numbers!


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Dear all,

I have having a text area field which has a limit of 100 characters only. Now, i also want to validate it such that it should only contain letter's (alphabet A-Z .a-z). It should not contain any number or @ symbol. If such things entered it should throw me an error saying invalid arguments like that.


I know it can be done with regular expressions. But i m not aware of how to do.


Can some one help with that.


Here is my script.


<script language="javascript" type="text/javascript">
function limitText(limitField, limitCount, limitNum) {
if (limitField.value.length > limitNum) {
	 limitField.value = limitField.value.substring(0, limitNum);
} else {
	 limitCount.value = limitNum - limitField.value.length;

<td valign="top" align="left">Description</td>
<td valign="top">:</td>
<td align="left"><textarea name="limitedtextarea" onkeydown="limitText(this.form.limitedtextarea,this.form.countdown,100);"
<font size="1">(Maximum characters: 100)<br>
You have <input readonly type="text" name="countdown" size="3" value="100"> characters left.</font></td>

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