Jquery checkboxes issue

Jquery checkboxes issue

HI All,

I am using jQuery in Drupal  CMS. There is functionality of advance search with 70 -80 checkboxes on a page.
On click on each checkbox a request is being sent and number of records from database are refelected on the page. It works fine untill you donot click on checkboxes too fast. If you click on checkboxes too fast then the result is not correct. I have looked in to php and jquery but not able to track down the issue. Hope somebody can help.

Is this jQuery limitation that clicks can not be too fast untill first request is complete?

Here is snippet of the code that may help

step 1 - jQuery function is called on checkbox click
//
'onclick' => 'javascript: showHinterR("region");',
//

step 2 - Request being processed in jQuery function in js file
/// this function replaces the count of db records in the html
function showHinter(str){   
 
     $.ajax({
       type: "POST",
       url: "?q=show_hint/no_of_villas",
       data: "str="+str,
       success: function(result){
            if(result){           
                $("#countDown").html(result);
            }

        }
     });
   
}

///