我正在使用http://www.dropzonejs.com/(dropzone.js)库。我已经将我的表单元素之一初始化为，vardrop=$("#upload").dropzone({uploadMultiple:"true",addRemoveLinks:"true",thumbnailWidth:"250",thumbnailHeight:"250",maxFilesize:"10",headers:{"title":titles,"location":locations,"tag":tags}});现在当用户点击按钮，我想使用drop.removeAllFiles(true)