// JScript File
function chkLogin()
{
    if (document.getElementById("<%=txtUserName.ClientID%>").value=="")
      {
                 alert("Name Feild can not be blank");
                 document.getElementById("<%=txtUserName.ClientID%>").focus();
                 return false;
      }
      if (document.getElementById("<%=txtPassword.ClientID%>").value=="")
      {
                 alert("Name Feild can not be blank");
                 document.getElementById("<%=txtPassword.ClientID%>").focus();
                 return false;
      }
      return true;
}