Add function for upload success click cancel button delete upload file

转http://www.oschina.net/question/552545_89332

开源中国(OsChina.NET)原始代码

'onUploadSuccess' : function(file, data, response) {  
    var cancel=$("#"+file.id + " .cancel a");
    if (cancel) {
    cancel.on('click',function () {
    //在这此处处理...
    //通过uploadify的settings方式重置上传限制数量
    $('#upload').uploadify('settings','uploadLimit', ++uploadLimit);
    //防止手快多点几次x，把x隐藏掉
    $(this).hide();
    });
    } 
},
运行上面的代码会报错
需要修改为如下：

'onUploadSuccess' : function(file, data, response) {  
    var cancel=$("#"+file.id + " .cancel a");
    if (cancel) {
    cancel.on('click',function () {
    //在这此处处理...
    //通过uploadify的settings方式重置上传限制数量
        var uploadLimit = $('#file_upload').uploadify('settings', 'uploadLimit');
    $('#upload').uploadify('settings','uploadLimit', ++uploadLimit);
    //防止手快多点几次x，把x隐藏掉
    $(this).hide();
        //添加代码删除文件
    });
    } 
},