how to make single radio button selection in gridview using javascript

[head id="Head1" runat="server">
[title>Grdview with Arraylist
[style type="text/css">
.Gridview
{
font-family:Verdana;
font-size:10pt;
font-weight:normal;
color:black;
width:300px;
}
[/style>
[script language="javascript" type="text/javascript">
function SelectSingleRadiobutton(rdbtnid) {
var rdBtn = document.getElementById(rdbtnid);
var rdBtnList = document.getElementsByTagName("input");
for (i = 0; i < rdBtnList.length; i++) {
if (rdBtnList[i].type == "radio" && rdBtnList[i].id != rdBtn.id)
{
rdBtnList[i].checked = false;
}
}
}
[/script>
[/head>
[body>
[form id="form1" runat="server">
[div>
[asp:GridView ID="gvdata" runat="server" CssClass="Gridview" AutoGenerateColumns="false" DataKeyNames="UserId" HeaderStyle-BackColor="#7779AF" HeaderStyle-ForeColor="White">
[Columns>
[asp:TemplateField>
[ItemTemplate>
[asp:RadioButton id="rdbUser" runat="server" OnClick="javascript:SelectSingleRadiobutton(this.id)" />
[/ItemTemplate>
[/asp:TemplateField>
[asp:BoundField DataField="UserName" HeaderText="Name"/>
[asp:BoundField DataField ="FirstName" HeaderText="FirstName" />
[asp:BoundField DataField="LastName" HeaderText="LastName" />
[asp:BoundField DataField="Location" HeaderText="Location" />
[/Columns>
[/asp:GridView>
[/div>
[/form>
[/body>
[/html>

how to calculate age of person and regular expression for mm/dd/yyyy format using JavaScript

[script type="text/javascript"]
function CalculateAge(birthday)
 {
var re=/^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\d\d+$/;
if (birthday.value != '') {
            If (re.test(birthday.value)) Then
{
birthdayDate = new Date(birthday.value);
dateNow = new Date();
var years = dateNow.getFullYear() - birthdayDate.getFullYear();
var months=dateNow.getMonth()-birthdayDate.getMonth();
var days=dateNow.getDate()-birthdayDate.getDate();
if (isNaN(years)) {
document.getElementById('lblAge').innerHTML = '';
document.getElementById('lblError').innerHTML = 'Input date is incorrect!';
return false;
}
else {
document.getElementById('lblError').innerHTML = '';
document.getElementById('lblAge').innerHTML = years +' Years ' +months +' months '+days +' days';
}
}
else
{
document.getElementById('lblError').innerHTML = 'Date must be mm/dd/yyyy format';
return false;
}}}
[/script]

[/head>
[body>
[form id="form1" runat="server">
[div>
Date of Birth :(mm/dd/yyyy)
[span style="color: Red">
[asp:Label ID="lblError" runat="server">
[br />
Age : [span id="lblAge">

[/div>
[/form>
[/body>
[/html>

How to disable right click on asp.net web page using JavaScript | Disable mouse right click on webpage

[script language="JavaScript" type="text/javascript"]
//Message to display whenever right click on website
var message = "Sorry, Right Click have been disabled.";
function click(e) {
if (document.all) {
if (event.button == 2 || event.button == 3) {
alert(message);
return false;
}
}
else {
if (e.button == 2 || e.button == 3) {
e.preventDefault();
e.stopPropagation();
alert(message);
return false;
}
}
}
if (document.all) {
document.onmousedown = click;
}
else {
document.onclick = click;
}
[/script]
[/head]
[body]
[form id="form1" runat="server"]
[div]
[/div]
[/form]
[/body]
[/html]