select one radio button which are in datalist in asp.net

ASPX Page Code--------->

javascript tag start from here---
function CheckOnes(chkControl)
{
var oItem = chkControl.children;
var theBox= (chkControl.type=="radio") ? chkControl : chkControl.children.item[0];

xState=theBox.unchecked;
elm=theBox.form.elements;

for(i=0;i

Data list code------------->
within datalist use server side checkbox
DataList ID="lstTemplates" runat="server" OnItemDataBound="lstTemplates_ItemDataBound"/
ItemTemplate/ asp:RadioButton ID="rdbTemplate" runat="server" /ItemTemplate
/DataList

Server side code for DataList-------------->

protected void lstTemplates_ItemDataBound(object sender, DataListItemEventArgs e)
{
RadioButton rdb;
rdb = (RadioButton)e.Item.FindControl(" rdbTemplate?);>if (rdb != null)
{
rdb.Attributes.Add("onclick", "CheckOnes(this);");
}
}