title: What's the CSS style I need to make a readonly textbox control look disabled
body: <p>Just to pre-empt the 'why do you want to do this' replies Here's what I'm doing:</p>
  
  <p>If another control is clicked I make an ajax call to get a server generated value and stuff it in the textbox.  I then, on the client-side, set the control to readOnly (I don't want to control to be disabled as I need it to postback so Im setting the readOnly attribute).</p>
  
  <p>Unfortunately as readOnly it doesn't <em>look</em> 'disabled'</p>
  
  <p>I'd like to get that disabled textbox look by doing an .addClass.</p>
  
  <p>I've mucked around with various styles but I'm no closer to getting that look.</p>
  
  <p>By the way this will be in IE (and could be IE7 or lower so no outline style I'm afraid).</p>
  
  <p>Any ideas gratefully received.</p>