<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Limit_number_of_characters_TextBox._Default" %>
<!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 runat="server">
<title>Untitled Page</title>
<script type="text/javascript">
function validateLimit(obj, divID, maxchar) {
objDiv = get_object(divID);
if (this.id) obj = this;
var remaningChar = maxchar - obj.value.length;
if (objDiv){
objDiv.innerHTML = remaningChar + " characters left";
}
if (remaningChar <= 0) {
obj.value = obj.value.substring(maxchar, 0);
if(objDiv) {
objDiv.innerHTML = "0 characters left";
}
return false;
}
else
{ return true; }
}
function get_object(id) {
var object= null;
if (document.layers) {
object = document.layers[id];
} else if (document.all) {
object = document.all[id];
} else if (document.getElementById) {
object = document.getElementById(id);
}
return object;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<div id="lblMsg1">120 characters left</div>
<asp:TextBox ID="TextBox1" runat="server" Height="50px" MaxLength="120"
TextMode="MultiLine" Width="600px" ToolTip="Summary:(120 characters)"
onkeyup="return validateLimit(this, 'lblMsg1', 120)"/>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
ControlToValidate="TextBox1" Display="Dynamic"
SetFocusOnError="True">*</asp:RequiredFieldValidator>
<br /><br />
</div>
</form>
</body>
</html>
Thanks
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Thanks
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