Artistan/jQuery ajax requests locking IE8

    <script type="text/javascript">
    ///////////////// Data icon INFO //////////////////////
    // /members/dataicon_ajx.php?login=cyberlot&item=1008CS-100E_TSG
    $(function(){
            $.ajaxSetup({
              timeout: 20000,
              async: true
            });
            // store whether we are searching for this one yet or not. CACHE
            var cache={};
            var delim_cache = '|||'

            // apply the search results. (callback for ajax)
            cache_ds = function(jsondata,status,xmlReq){
                $.each(jsondata, function(itemno,data) {
                  //console.log(itemno,data);
                  show_icon(data);
                });
                //console.log(jsondata);
                return false;
        }

            // caching and doing one call to get around the browser limit for # of requests and speed things up
            cache=new Array();
        $('.findthese').each(
                // update the findthese item numbers
                function(index,domEle){
                    var $this = $(domEle);
                    var st = typeof(cache[$this.html()]);
                    if(st == 'undefined'){
                        cache.push($this.html());
                    }
                }
            );
            cache = $(cache).get().join(delim_cache);
            //console.log(cache);

            // post all the items to get additional info.
            $.post("dataicon_ajx.php", { name: "{{$login}}", items: cache , delim: delim_cache, ac:'items' },cache_ds,'json');
    });

        function show_icon(data){
            if(data.itemNumber){
            console.log('Icon it',data.itemNumber);
                // update the findthese icons
                $('.findthese').each(
                    function(index,domEle){
                        try{
                            var $this = $(domEle);
                            if($this.html() == data.itemNumber){
                                // clear the temp data
                                // make findthese Icon show if needed.$this.html('');
                                if(data.pbFree_findthese=='Yes'){
                                    $this.addClass('findthese_active');
                                    //alert('Icon On '+data.itemNumber);
                                    $this.html('').removeClass('findthese');
                                }
                                // if active, update the link directly to data icon.
                                if(data.active=='1' && data.data_icon!=''){
                                    var parent = $this.parent();
                                    parent.attr('href',data.data_icon);
                                }
                            }
                        } catch(e) {
                            //console.log(e);
                        }
                    }
                );
            }
    }
    </script>