Clear cookie with javascript or php script -


i have problem need guys me.i set cookie javascript when user make change select tag in html code , clear want clear it.

* if in php script need clear or delete , if in jquery script need delete old 1 , set new 1 of cookie value when user make change select tag. let's see script below.

jquery script

<script type="text/javascript">   $(function(){      $('#category').live('change',function(){        var opt = $('category :seleted').val();        document.cookie='category_name='+opt; //set cookie when user make change        $.ajax({          type:'post',          url : 'getcatetgory.php',          data : {option : opt},          success: function(){alert('you have on category')}       });     });   }); </script>

html

<select id='category'>   <option value='car'>car</option>   <option value='house'>house</option>   <option value='sport'>sport</option>   <option value='song'>song</option>   <option value='phone'>phone</option> </selete>

this have done php script.

unset($_cookie['category_name']);

but still doesn't work me. please guide me

to delete cookie, must set cookie same name, path , domain, expiry date in past.


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