jquery循环在刷新时重复结果

Question

我的jquery循环出现问题。容器刷新后，它会不断添加相同的条目。代码是......

$(function() {

$('<div />').html('<div id="buddies" class="buddies" style="vertical-align:bottom"><div class="imheader">&nbsp;Online Favorites<span class="fr"><a href="#" id="exitlist">X</a></span></div><div class="imheader2"><div class="imheaderspan"><a href="#">Options</a></div></div><ul class="imwindow"><div id="myonlinefavs"></div></ul></div><div id="chatbar" class="chatbar"><div id="ims"></div><div class="buddylist" id="buddylist"><center><a href="#" id="im-menu" class="im-menu">Favorites (<strong id="friendsonline">0</strong>)</a></center></div></div>').appendTo('body');

var imRoot = $("#im-menu");
var buddies = $("#buddies");
imRoot.click(function(){
buddies.toggle();
imRoot.blur();
return( false );
});
$("#exitlist").click(function(){
buddies.toggle();
imRoot.blur();
return( false );
});
$(document).click(function( event ){
if (buddies.is( ":visible" ) && !$( event.target ).closest( "#buddies" ).size()){
    buddies.hide();
}
});
$(function FL(){
    $.ajax({
        type: 'POST',
        url: 'config/receive_buddylist.php',
        cache: 'false',
        dataType: 'json',
        success: function(data){    
            onlineNumber = buddylistreceived = 0;
            data && $.each(data, function(i, e){
                if (i == "buddylist") {
                    buddylistreceived = 1;
                    totalFriendsNumber = onlineNumber = 0;
                    $.each(e, function (l, f) {
                        if(f.id != null){
                            longname = f.n.length > 16 ? f.n.substr(0, 16) + "..." : f.n;
                            $('#myonlinefavs').append('<li>' + longname + '</li>');
                        }
                        if(f.s == '0') onlineNumber++;
                        totalFriendsNumber++;                           
                    });
                }
            });
            R = onlineNumber;
            if (R > 0){
                $('#friendsonline').html(onlineNumber);
            } else {
                $('#myonlinefavs').html('No favorites online.');
                $('#friendsonline').html('0');
            }
        }
    });
    Z = setTimeout(function () {
        FL()
    }, 1000)

});


});