When using the hover event on a disabled input, no event is raised (beside for opera 10.63). Same goes for bind with mouseover.

#!js
$(document).ready(function(){
  $('.hover-this').bind('mouseover', function(){
    $(this).css({border: '1px solid red'});
  });
	
  $('.hover-this').hover(function(){
    $(this).css({border: '1px solid red'});
  }, function(){
    $(this).css({border: '0px'});
  });
});

#!html
<fieldset style="width: 350px; margin: auto; text-align: center;">
<legend>For these inputs</legend>
<input id="input-enabled" class="hover-this" type="text" value="input enabled" />  
<input id="input-disabled" class="hover-this" type="text" value="input disabled" disabled="disabled" />
<i>Both input have 'hover-this' as class</i>
</fieldset>
<br /><br />