title: How to make up some check box look as if it's disabled
body: <p>Which attribute of input tag I should set to make up below check box look as if it's disabled. </p>
  
  <pre><code>&lt;input type="checkbox" name="selectedUsers" value="gng"  /&gt;
  </code></pre>
  
  <p>However, I don't want to use "disabled" attribute to really disable it because I want its value submitted to web server.</p>
  
  <p>More details: </p>
  
  <pre><code>&lt;input type="checkbox" name="selectedUsers" value="user1"  /&gt;
  &lt;input type="checkbox" name="selectedUsers" value="user2"  /&gt;
  &lt;input type="checkbox" name="selectedUsers" value="user3"  /&gt;
  </code></pre>
  
  <p>I have a list of users and check box to indicate whether it has editor role. System allows admin change user's roles by checking boxes and hit a button Confirm. Then Web server will check variables "selectedUsers" to see the list of user are checked, and do a comparation with role values of users from database. If server sees the difference, it will do appropriate actions, either delete or add editor's role of that users from a database table. </p>
  
  <p>For example, user1 is not on variable "selectedUsers" but in database table, it has this role, so system understands that the admin want to delete editor role of that user, and vice versa.</p>
  
  <p>However, some users are already admin users, hence I don't allow other admin can change these users roles, just able to see its roles. So I want check boxes for these admin users appearing to be disabled. I can't use: disabled="disabled" because if I really disable a checkbox, the user of this checkbox <strong>always</strong> be excluded from variable "selectedUsers". </p>
  
  <p>Update after 5 hours:</p>
  
  <p>I'm able to change UI to not allow client to modify check box as below. Clients can click on checkbox but check box doesn't change their value.</p>
  
  <pre><code>&lt;input type="checkbox" name="selectedUsers" value="amdin1" onclick="return false" onkeydown="return false" /&gt;
  </code></pre>
  
  <p>The current problem is to find a way to indicate client that the website don't want them to check/uncheck boxes. That way I want this check box look immutable (somehow by changing background color, ...).</p>