Textarea Character Limit

I need a nice way to stop people from entering too many characters into a text box.  It would be nice if it worked for text that is too long that is copy-n-pasted into the textbox as well.  I am looking for an alert message that would come up when a limit was reached if possible.

Thank so muich.
Bob SchneiderCo-OwnerAsked:
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leakim971PluritechnicianCommented:
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Gurvinder Pal SinghCommented:
its simple...give maxlength attribute to it
http://www.w3schools.com/tags/att_input_maxlength.asp

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Wayne BarronAuthor, Web DeveloperCommented:
This is what I use, it it works great.

Carrzkiss
<%@LANGUAGE="VBSCRIPT" CODEPAGE="65001"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script>
function limitText(limitField, limitCount, limitNum) {
	if (limitField.value.length > limitNum) {
		limitField.value = limitField.value.substring(0, limitNum);
	} else {
		limitCount.value = limitNum - limitField.value.length;
	}
}
</script>
</head>

<body>
<form>
<textarea name="ShortDesc" onKeyDown="limitText(this.form.ShortDesc,this.form.countShortDesc,3000);" onKeyUp="limitText(this.form.ShortDesc,this.form.countShortDesc,3000);"></textarea>
<input class="UpFF" readonly="readonly" type="text" name="countShortDesc" size="3" value="3000" />
</form>
</body>
</html>

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Bob SchneiderCo-OwnerAuthor Commented:
Thanks.  The first solution is not allowed for text areas...or at least not recommended.  Regarding the last suggestion, I like it but it clears the textarea when you reach the maximum characters rather than just preventing more input.  Am I doing something wrong?
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