Hi Terry, 

Thanks for your reply.

The changes i made shouldnt affect the OnUploadCompleted method. I only changed the UI arround the uploader and added the following BLOCKED SCRIPT

    function CuteWebUI_AjaxUploader_OnStop() {
        var submit = document.getElementById('<%=btSubmit.ClientID %>');
        var cancel = document.getElementById('<%=btCancelUpload.ClientID %>');
        var span = document.getElementById('<%=span_upload.ClientID %>');
        span.removeChild(submit);
        span.removeChild(cancel);
        span.appendChild(submit);
        span.appendChild(cancel);
        var hidden = this;
        hidden.internalobject.insertBtn.style.display = '';
        document.getElementById('<%=btSubmit.ClientID %>').style.visibility = 'visible';
    }


            function CuteWebUI_AjaxUploader_OnInitialize() {
                var uploader = document.getElementById("<%=AjaxUpload.ClientID %>");
                uploader.handlequeueui = myqueueuihandler;
            }

    function myqueueuihandler(list) {
        //        if (list.length < 2) {
        //            document.getElementById('<%=queuediv.ClientID %>').style.display = "none";
        //        }
        //        else {
        document.getElementById('<%=queuediv.ClientID %>').style.display = "";
        var container = document.getElementById('<%=queuedivtablecontainer.ClientID %>');
        container.innerHTML = "";

        var table = document.createElement("table");
        table.style.borderCollapse = "collapse";
        table.cellSpacing = 0;
        table.cellPadding = 4;
        table.border = 1;
        table.borderColor = "darkgreen";

        for (var i = 0; i < list.length; i++) {
            if (list[i].Status != 'Error') {
                var name = list[i].FileName;
                var size = list[i].FileSize; // (or -1)
                var stat = list[i].Status; // Finish|Error|Upload|Queue
                var func = list[i].Cancel;
                var row = table.insertRow(-1);
                row.insertCell(-1).innerHTML = name;
                var last = row.insertCell(-1);
                if (stat == "Queue") {
                    var btn = document.createElement("A");
                    btn.href = "BLOCKED SCRIPTvoid(0)";
                    btn.onclick = func;
                    btn.innerHTML = "Abbrechen";
                    last.appendChild(btn);
                } else {
                    last.innerHTML = stat;
                }
            }
        }
        container.appendChild(table);
        //}
        return false; //hide the default;
    }

    function cancelalltasks() {
        var uploader = document.getElementById("<%=AjaxUpload.ClientID %>");
        uploader.cancelall();
    } 

The JavaScript I already had before is this:

    function submitbutton_click() {
        if (!ValidatorOnSubmit())
            return false;
        
        var uploadobj = document.getElementById('<%=AjaxUpload.ClientID %>');
        if (uploadobj.getqueuecount() == 0)
            return false;

        try {
            var submit = document.getElementById('<%=btSubmit.ClientID %>');
            var cancel = document.getElementById('<%=btCancelUpload.ClientID %>');
            var span = document.getElementById('<%=span_upload.ClientID %>');
            submit.style.visibility = 'hidden';
            cancel.style.visibility = 'visible';
            span.removeChild(submit);
            span.removeChild(cancel);
            span.appendChild(cancel);
            span.appendChild(submit);
        } catch(e) {
            alert(e);
        } 
        
        if (!window.filesuploaded) {
            if (uploadobj.getqueuecount() > 0) {
                uploadobj.startupload();
            }
            return false;
        }
        window.filesuploaded = false;
        return true;
    }  
    function CuteWebUI_AjaxUploader_OnPostback() {
        window.filesuploaded = true;
        var submitbutton = document.getElementById('<%=btSubmit.ClientID %>');
        submitbutton.click();
        return false;
    }