Question

I think that I have a memory leak in my app witch I can’t localize.

The application downloads content and displays it. When the content is already downloaded it just displays it (because it was downloaded earlier).

The bug shows up when I choose at least 10 different options from the select.
(choose option 1 and confirm with #wcc-submit and wait to load, …, choose option 10 and confirm with #wcc-submit and wait to load). With each selected option the app gets slower. Finally this error shows up:

The app is tested in IE6.

js:

<script type="text/javascript">
(function($){
$(function(){
var language = 'de';
var fadeOutSpinnerFadeInContent = function(pageID) {
    $('#wcc-loader').fadeOut(500, function() {
        $('#wcc-content-'+pageID).fadeIn(500);
    });
};
var makeAjaxCall = function(pageID) {
    $.ajax({
        url: '/some/path/'+language+'/'+pageID+'.php',
        type: 'get',
        dataType: 'html',

        success: function(data, textStatus, jqXHR) {
            $('#wcc-content-container').append('<div id="wcc-content-'+pageID+'" class="wcc-content hide">'+data+'<div>');
        },
        error: function(jqXHR, textStatus, errorThrown) {
            alert('error');
        },
        complete: function(jqXHR, textStatus) {
            fadeOutSpinnerFadeInContent(pageID);
        }
    });
};
var downloadContent = function(pageID) {
    $('#wcc-loader').fadeIn(500, function() {
        makeAjaxCall(pageID);
    });//end fade out spinner
};
var openPage = function(pageID) {
    var earlierContent = $('.wcc-content');
    if( earlierContent.size() > 0 ) {
        earlierContent.fadeOut(500, function() {
            if( $('#wcc-content-'+pageID).size() > 0 ) {
                $('#wcc-content-'+pageID).fadeIn(500);
            } else {
                downloadContent(pageID);
            }
        });
    } else {
        downloadContent(pageID);
    }
};

var availableHashArray = [
    '-1',
    'page_id_1',
    'page_id_2',
    ...
    'page_id_100',
    ],
    choosenHash = $.inArray( window.location.hash.substring(1), availableHashArray);

$('#wcc-submit').bind('click.cs', function() {
    var selectedValue = $('#select-1').val();

    if(parseInt(selectedValue, 10) !== -1) {
        window.location.hash = selectedValue;
        openPage(selectedValue);
    }
});

if( choosenHash !== -1 ) {
    $('#select-1 option[selected="selected"]').removeAttr('selected');
    $('#select-1 option').eq(choosenHash).attr('selected', 'selected');
    $('#wcc-submit').trigger('click.cs');
}

});
})(jQuery);
</script>

html:

<div id="wcc-form" class="fm-form">
    <form action="#" method="post">
        <div class="select-form">
                    <label class="hidden" for="select-1">Choose an option</label>
                    <select id="select-1" class="fm-text fm-select" name="select-1" >
                        <option value="-1" selected="selected">Choose an option</option>
                        <option value="page_id_1" selected="selected">option 1</option>
                        <option value="page_id_2" selected="selected">option 2</option>
                        ...
                        <option value="page_id_100" selected="selected">option 100</option>
                    </select>
                    <input id="wcc-submit" type="button" value="Show" />
        </div>
    </form>
</div>
<div id="wcc-content-container">
</div>
<div id="wcc-content-container">
    <div id="wcc-loader" class="hide"></div>
</div>

css:

<style type="text/css">
.hide{
    display:none;
}
#wcc-loader{
    height:50px;
    background:#fff url('/some/path/to/spinner.gif') 50% 50% no-repeat;
}
    #select-1{
        margin-left:20px;
    }
</style>

Answer 1

Ah yes, I know the answer to this one.

“Disregard the whole problem because it’s IE6 and it has to die.”

What? Someone had to say it.