javascript - Database Search with multiple parameters -

im using folowing search database :

   <script type="text/javascript">       $(function() {         $("#lets_search").bind('submit',function() {           var cat1 = $('#cat1').val();            $.post('db.php',{cat1:cat1}, function(data){              $("#search_results").html(data);            });            return false;         });       });     </script> 

cat1 id of drop down box. want add drop down box query :

select *    business   category='".$_post['cat1']."' , subcategory='".$_post['cat2']."' 

i cant seem javascript work more 1 drop down. have tried , didnt work.

<script type="text/javascript">   $(function() {     $("#lets_search").bind('submit',function() {       var cat1 = $('#cat1').val();        var cat2 = $('#cat2').val();        $.post('db.php',{cat1:cat1},{cat2:cat2}, function(data){          $("#search_results").html(data);        });        return false;     });   }); </script> 

you constructing data in wrong wya. try -

$.post('db.php',{cat1:cat1,cat2:cat2}, function(data){ ...