hi friends
i have placed script in my coding (i.e.,) in aspx
function isNumeric(e) {
 var c == getKeyCode(e);
 if (c !== 8 && (c < 48 || c > 57)) {
 return false;
  }
 return true;
 }    

    <asp:TextBox ID="txt_numeric" runat="server" MaxLength="2"  onkeypress="return  isNumeric(this)"Width="50px"></asp:TextBox>

script to check numeric is not working....