send to Ajax when timer ends

This timer works fine but I need to send the results to Ajax when it is done. This seems to work in chrome unless the cache is cleared or it plays the first few times. I'm wondering if there is another way to send it to Ajax when it is done. I don't know how to tell when it's done. Somebody helped me with this code and I'm very new at code.

http://squareonemeditation.com/webapp/meditatetest.php


 
function drawTimer(percent){
             
             $('div.timer').html('<div id="slice"'+(percent > 50?' class="gt50"':'')+'><div class="pie"></div>'+(percent > 50?'<div class="pie fill"></div>':'')+'</div>');
             var deg = 360/100*percent;
             $('#slice .pie').css({
                   '-moz-transform':'rotate('+deg+'deg)',
                   '-webkit-transform':'rotate('+deg+'deg)',
                   '-o-transform':'rotate('+deg+'deg)',
                   'transform':'rotate('+deg+'deg)'
             });
             $('.percent').html(Math.round(percent)+'%');
       }
       
       $(stopWatch = function() { 
       
             if(percent >=100){
                   drawTimer(100);
                   clearInterval(timer);
                                           
                               $.ajax({
                                     url: "postmeditate.php",
                                     type : "POST",
                                     data: { length: length, userid: userid},
                               })
                               .success(function (response){
                                     location.href = "tracking.php";                                          
                               })
                               .error(function (e){
                               });
                   
             }else{
                   percent += (timerSeconds/minutes)
                   drawTimer(percent);
                   counter++;
             }

 });

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designaireAsked:
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leakim971PluritechnicianCommented:
replace line 20 :
 $.ajax({

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by :
 $.ajax({
      async:false,

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designaireAuthor Commented:
I think it works!! I have to test it a bit more.
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designaireAuthor Commented:
I can't thak you enough
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