请问怎么用JS判断循环的文本有没有填写内容?

<script language="javascript">
  function submit_oa_sz_add(cg_id,bitian,nr_type,nr)
  {
      if(bitian==1)//当为必填项时
      {
          var ids   = document.getElementById("sznr_"+cg_id);
          if(nr_type=="多选")
          {
              var ids_f      = document.getElementsByName("sznr_"+cg_id+"[]");
              var checkNum_f = 0;
              for (var i = 0; i < ids_f.length; i++) {
                  if (ids_f[i].checked) {
                      checkNum_f++;
                  }
              }
              if(checkNum_f==0)
              {
                  alert(nr+"为必选项,请选择"+nr+"!");
                  return false;
              }
          }
          else if(nr_type=="单选"){
              var ids_d      = document.getElementsByName("sznr_"+cg_id);
              var checkNum_d = 0;
              for (var i = 0; i < ids_d.length; i++) {
                  if (ids_d[i].checked) {
                      checkNum_d++;
                  }
              }
              if(checkNum_d==0)
              {
                  alert(nr+"为必选项,请选择"+nr+"!");
                  return false;
              }
          }
          else{
              if(ids.value=='')
              {
                  alert(nr+"为必填项,不能为空!");
                  $("input[name=sznr_"+cg_id+"]").focus();
                  return false;
              }
          }
      }
      return true;
  }
script>
<form action="?act=add_update" enctype="multipart/form-data" method="post" name="frm" id="frm" onsubmit="return submit_oa_sz_add({$cg.cg_id},{$cg.bitian},'{$cg.nr_type}','{$cg.nr}');">
 
    <tr>
        <td width="29%" height="80" align="center" class="biankuan3"><span class="STYLE3">*span> 文本测试(必填)td>
        <td colspan="2" align="left" class="biankuan10" style="font-size: 16px;"> 
            <input type="text" name="sznr_1739" id="sznr_1739" class="style5" />
        td>
    tr>
    <tr>
        <td width="29%" height="80" align="center" class="biankuan3"><span class="STYLE3">*span> 多行文本测试(必填)td>
        <td colspan="2" align="left" class="biankuan10" style="font-size: 16px;"> 
            <textarea name='sznr_'.1740.'' id='sznr_'.1740.'' cols='60' rows='5'>textarea>
        td>
    tr>
    ..................这个后面还有很多需要填写的文本
    请问怎么用JS判断循环的文本有没有填写内容?

form>

请问怎么用JS判断循环的文本有没有填写内容?


 onsubmit="return submit_oa_sz_add({$cg.cg_id},{$cg.bitian},'{$cg.nr_type}','{$cg.nr}');"
<!--这个提交在循环外面,所以后面的参数传不过去,应该怎么弄呢?-->