- In the <HEAD> tag of the design page(.aspx) create the JavaScript functions as:
<script type="text/javascript">
function characterCounter(controlId, countControlId, maxCharlimit) {
if (controlId.value.length > maxCharlimit)
controlId.value = controlId.value.substring(0, maxCharlimit);
else
countControlId.value = maxCharlimit - controlId.value.length;
}
</script>
- In the <BODY> tag copy and paste the following:
<fieldset style="width:280px;">
<legend>Counting Remaining Characters example</legend>
<asp:TextBox ID="txtComments" Width="280px" Rows="4" Columns="12"runat="server" TextMode="MultiLine" onkeyup="characterCounter(txtComments, this.form.remCount, 150);" onkeydown="characterCounter(txtComments, this.form.remCount, 150);" />
<input type="text" name="remCount" size="3" maxlength="3" value="150"readonly="readonly" /> characters left
</fieldset>
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