问在IE 9中，plupload似乎不能上传文件。它可以在其他浏览器中工作

EN

function initUploader(btnId, fileType, onSuccess) {

    if (typeof fileType == "undefined") fileType = "image";

    var arrFilters = new Array();
    var url = 'user/attachmentUpload';

    switch (fileType) {
        case "image": 
            arrFilters = [{title : "Image files", extensions : "jpg,jpeg,gif,png"}]; 
            url = 'assets/imgupload';
            break;
        case "xls":
            arrFilters = [{title : "Spreadsheet files", extensions : "xls,xlsx"}]; 
            url = 'user/attachmentUpload';
            break;
        case "media":
            arrFilters = [{
                title : "Media files", 
                extensions : "mpeg4,mob,3gpp,avi,wmv,mp3,m4a,ogg,wav"
            }]; 
            break; 
        case "document":      
            arrFilters = [{
                title : "Text files", 
                extensions : "doc,docx"
            },{
                title : "PDF files", 
                extensions : "pdf"
            }]; 
            break; 
        default:      
            arrFilters = [
                {
                    title : "Image files", 
                    extensions : "jpg,jpeg,gif,png"
                },
                {
                    title : "Zip files", 
                    extensions : "zip"
                },
                {
                    title : "Media files", 
                    extensions : "mpeg4,mob,3gpp,avi,wmv,mp3,m4a,ogg,wav"
                },
                {
                    title : "Spreadsheet files", 
                    extensions : "xls,xlsx"
                },
                {
                    title : "Text files", 
                    extensions : "doc,docx"
                },
                {
                    title : "PDF files", 
                    extensions : "pdf"
                }
            ]; 
            break; 
    }

    var uploader = new plupload.Uploader({
        runtimes : 'gears,html5,html4,flash,silverlight,browserplus',
        browse_button : btnId,
        //container : 'container',
        max_file_size : '10mb',
        url : url,
        flash_swf_url : 'assets/js/vendor/plupload/plupload.flash.swf',
        silverlight_xap_url : 'assets/js/vendor/plupload/plupload.silverlight.xap',
        multiple_queues : false,
        filters : arrFilters,
        resize : {width : 320, height : 240, quality : 90}
    });

    $('#'+btnId).change(function(){
        uploader.start();
    });    
    uploader.refresh();
    uploader.init();
    uploader.bind('FilesAdded', function(up, files) {
        up.refresh(); // Reposition Flash/Silverlight
        Utility.showProcessingBar();
        uploader.start();
    });
    uploader.bind('Error', function(up, err) {
        alert("Error: " + err.code + ", Message: " + err.message + (err.file ? ", File: " + err.file.name : ""));
        up.refresh(); // Reposition Flash/Silverlight
    });

    uploader.bind('FileUploaded', function(up, file, response) {
        var obj = eval('(' + response.response + ')');
        //alert('Files uploaded');
        if (typeof onSuccess == "function")
            onSuccess(obj.fileName);   
    });

}