Trying to manually remove a file from Multifile upload

I'm using jQuery Multiple File Upload Plugin and I have the following:

$(function(){ // wait for document to load
    $('#attachFiles').MultiFile({
        list: '#attList',
        STRING: { remove: '<img src="cross.gif" title="Remove this attachment" border="0">' },
        afterFileAppend: function(element, value, master_element) {
            $(".amount").each(function(){
                var i       = $(this).attr("i");
                var curVal  = $("#attachment_" + i).val();
                if($("#attachment_" + i).is(":checked") && curVal == "X") {
                    $("#attachment_" + i).attr("value", value);
                    $("#attachment_" + i).attr("title", "Attachment " + value + " linked");
                    aCounter++;
                };
            });
            if(aCounter==0) {
        开发者_如何学JAVA        alert("You need to select...");
                //Remove should be here
            }
        }
    });
});

If I add a file named test.pdf then one named test2.pdf my goal is to automatically remove test2.pdf if my aCounter variable is 0 (that would mean the user did not check off any additional check boxes named attachment_#.

I can't seem to figure out how to remove just the file that was added. If I understand correctly, the value of the file that I add gets added to id="attachfiles" which is a

<input type="file" name="userfile[]" id="attachFiles" class="file" size="1" accept="pdf|jpg|jpeg">

So I'm assuming I should be able to somehow remove the most recently added item somehow. Any assistance or guidance would be great.

---

The jQuery Multiple File plugins that I've used do NOT use some array to hold the set of files. They use a series of

<input type="file" ... style="position:absolute; left:-3000px;" /> 
<input type="file" ... style="position:absolute; left:-3000px;" />

elements that are hidden after the user selects a file. The displayed input element is replaced with a new one. This also seems to be the case with your plugin. You should be able to find the most recent file by doing some selector

$("#mydiv input[type='file']").last()

or something similar and removing it from the DOM.

You can probably also do a trigger('click') on the appropriate delete button.