上传组件

@@ -48,6 +48,7 @@ function getResponse(cb) {
 
         if (num > 20 || res) {
             uping = false;
+            $filename.val('');
             clearInterval(inter);
         }
 
@@ -63,9 +64,11 @@ function getResponse(cb) {
 }
 
 $filename.change(function() {
-    uping = true;
-    $upload.submit();
-    getResponse(callback);
+    if ($(this).val()) {
+        uping = true;
+        $upload.submit();
+        getResponse(callback);
+    }
 });
 
 exports.up = up;