why a disabled element can be enable by end user?
<p>I Disable a textbox by c# code in an ASP.net Page with below code:
Textbox1.Enabled=false; 
to prevent user changing a specific value.
as you know Textbox1.Enabled=false;  in html mode will convert to disabled="disabled" css prpoerties.
but unfortunately end user can remove this css properties by Firefox Firebug and enable the textbox and press the submit button and send the changed value to server.
so what can I do?</p>
