Handling the radio button list with yes or no confirmation message in C#

rdbbilltype.Attributes.Add("onclick", "if(!confirm('Are you sure to change the bill type? ')) return false;");

Looks simple but it will allow only when the OK button is clicked, Or else it wont change the selection.

Awesome...!!!

Javascript validation for special characters in ASP.NET/ C#

function validatespecailchars()
{

     var txtbox = document.getElementById('<%=txtsearch.ClientID %>').value;
   
      var str="<";
        var str1=">";
        var str2="--";
        var str3=";";
        var str4="'";

    if((txtbox.indexOf(str)>=0)||(txtbox.indexOf(str1)>=0)||(txtbox.indexOf(str2)>=0)||      (txtbox.indexOf(str3)>=0)||(txtbox.indexOf(str4)>=0))
    {
         alert('Special Characters are not Allowed.');
        // you can focus here that particular control
     }
}