如何计算Div中隐藏的输入元素的数量

Question

here is the code :

   <div class="upload"><br>
  <br>
  <br>
  <input type="hidden" value="" id="SWFUpload_0_3" name="jpg_uploaded_files[]">
  <br>
  <input type="hidden" value="" id="SWFUpload_0_4" name="jpg_uploaded_files[]">
  <br>
  <input type="hidden" value="" id="SWFUpload_0_5" name="jpg_uploaded_files[]">
  <br>
  <input type="hidden" value="" id="SWFUpload_0_6" name="jpg_uploaded_files[]">
  <br>
  <input type="hidden" value="" id="SWFUpload_0_7" name="jpg_uploaded_files[]">
  <br>
  <input type="hidden" value="" id="SWFUpload_0_8" name="jpg_uploaded_files[]">
  <br>
</div>

Answer 1

正在工作 DEMO

试试这个

 $('.upload input:hidden').length

Answer 2

尝试将属性equals filter与属性type

一起使用

var len = $('.upload input[type="hidden"]').length

Answer 3

$("input[type='hidden']").length;

Answer 4

试试这个

$('.upload').find($("input[type='hidden']")).length

Demo