Asp.net RadioButton with JS Confirmation

Here is the way of Asp.net radiobutton with confirmation.

1. In code behind find radio buttons and add onclick event.
2. Write a JS function that can postback with option.
3. Catch postback parameter in Page load 
(string parameter = Request["__EVENTARGUMENT"]; )
4. In RadioButtonSelectedIndexChanged event do what you need to do in confirm and not confirm.

PS: I know that is doesn't explain well the process but when you implement the code you will get it.

Code behind

 protected void Page_Load(object sender, EventArgs e)
        {
            string parameter = Request["__EVENTARGUMENT"];

            if(parameter!=null)
            if (parameter.Equals("Itrue") || parameter.Equals("Ifalse"))
            {
                confirm = parameter;

            }
            
            ListItem l1 = InterestTypeList.Items.FindByValue("stb");
            ListItem l2 = InterestTypeList.Items.FindByValue("spt");
            l1.Attributes.Add("onclick", "javascript:return validate_delete('" + l1.Value + "','" + InterestTypeList.ClientID + "')");
            l2.Attributes.Add("onclick", "javascript:return validate_delete('" + l2.Value + "','" + InterestTypeList.ClientID + "')");
            
        }

  protected void InterestCMRadioButtonListOnSelectedIndexChanged(object sender, EventArgs e)
        {
            if (confirm.Equals("Ifalse"))
            {
                // if not confirm

                return;
            }

            //    if confirm
            
        }

JS function to post back with options

  function validate_delete(InputValue, InputItem)
        {
                var item = document.getElementById(InputItem);
           
                var r = confirm("Confirm ?");
                if (r == true)
                {
                    setTimeout('__doPostBack(\'' + item.id + '\',\'' + "Itrue" + '\')', 0);
                    return true;
                }
                else {
                    setTimeout('__doPostBack(\'' + item.id + '\',\'' + "Ifalse" + '\')', 0);
                    return true;
                }


        }