抄表单详情添加电表倍率，以及计算用电量

application/em/view/useage/detail.html

@@ -240,17 +240,11 @@
                 return false;
             });
 
-
             var rn = $('#repo_numb');
             var lNv = Number($('#last_numb').val());
             var cNv = Number($('#current_numb').val());
-            if(cNv > lNv){
-                var reN = (cNv - lNv)*Number($('#rate').val());
-                rn.val(reN)
-            } else {
-                rn.val('')
-            }
-
+            var reN = (cNv - lNv)*Number($('#rate').val());
+            rn.val(reN)
         });
 </script>
 {/block}
\ No newline at end of file