Disable with jQuery enable with Server

Disable with jQuery enable with Server

I am disabling a button with jQuery like this:

$(document).ready(function(e){
$('#myButton').click(function (e) {
 $('#myButton').attr('disabled', 'disabled');
   __doPostBack('myButton', '');
});

and on the server:

myButton.Enabled = true;

but the button is still disabled on post back.

Very confused.