jquery ajax发送delete(use in jquery file upload delete file)

<div class="pic-preview">
<div class="pic"></div>
</div>
<div class="pic-action">
<span class="btn btn-success fileinput-button">
<i class="glyphicon glyphicon-plus"></i>
<span>上傳圖片</span>
<!-- The file input field used as target for the file upload widget -->
<input id="fileupload" type="file" name="files[]">
</span>
</div>
<div id="progress" class="progress">
<div class="progress-bar progress-bar-success"></div>
</div> <input type="hidden" name="pic" id="pic" value="">

(function(){
$(function(){
//init fileupload
$('#progress').hide();
var url = '<?php echo $dn.'Uploader.php';?>';
$('#fileupload').fileupload({
url: url,
dataType: 'json',
done: function (e, data) {
$.each(data.result.files, function (index, file) {
$(".pic").empty().append('<img src="'+file.thumbnailUrl+'">');
$("#pic").val(file.name);
$(".pic-action").append('<span class="btn btn-danger" data-type="'+file.delete_type+'" data-url="'+file.deleteUrl+'" onclick="removePic(this)" >刪除</span>');
});
$('#progress').hide();
},
progressall: function (e, data) {
$('#progress').show();
var progress = parseInt(data.loaded / data.total * 100, 10);
$('#progress .progress-bar').css(
'width',
progress + '%'
);
}
}).prop('disabled', !$.support.fileInput)
.parent().addClass($.support.fileInput ? undefined : 'disabled');
});
})();