为什么“”即使被告知不要创建新行

我在"'"创建一行时遇到问题，即使它被告知在复制时不要这样做。修复可能是由于某种原因我没有看到的简单程序。我将不胜感激对这个问题的任何投入或指导。

(请只给我Javascript答案，因为我对jquery或其他方法不感兴趣(

       <script type="text/javascript">
        if (pullDownResponseE == "")
        {
        }
        else {
        var pullDownValuesE = document.getElementById("taskOne");
        var pullDownResponseE = pullDownValuesE.options[pullDownValuesE.selectedIndex].value;
        stuffToCopy = stuffToCopy + "'n" + pullDownResponseE;
        }

        if (pullDownResponseF == "")
        {
        }
        else{
        var pullDownValuesF = document.getElementById("taskTwo");
        var pullDownResponseF = pullDownValuesF.options[pullDownValuesF.selectedIndex].value;
        stuffToCopy = stuffToCopy + "'n" + pullDownResponseF;
        }
        </script>

如您所见，如果我的下拉值等于 " 并且这部分在大多数情况下有效，则 pullDownResponseF 和 pullDownReponseE 应该什么都不做，除了换行符 "'" 部分之外，它不会执行任何其他代码。

谁能解释一下这里出了什么问题？

编辑：拥有更多代码可能会有所帮助。我只会包括必要的部分，因为它太长了。

        <script type="text/javascript">
        function copyNotesTemplate()
        { 
        var stuffToCopy = document.getElementById('myForm').value;
        if(stuffToCopy.length > 1)
        {
        var stuffToCopy = "PT meets criteria" + "'n" + document.getElementById('myForm').value;
        }
        if(document.getElementById('noPtCriteria').checked)
        {
        var stuffToCopy = document.getElementById('noPtCriteria').value;
        }

        if (pullDownResponsee == "")
        {
        }
        else {
        var pullDownValuese = document.getElementById("taskOne");
        var pullDownResponsee = pullDownValuese.options[pullDownValuese.selectedIndex].value;
        stuffToCopy = stuffToCopy + "'n" + pullDownResponsee;
        }

        if (pullDownResponsef == "")
        {
        }
        else{
        var pullDownValuesf = document.getElementById("taskTwo");
        var pullDownResponsef = pullDownValuesf.options[pullDownValuesf.selectedIndex].value;
        stuffToCopy = stuffToCopy + "'n" + pullDownResponsef;
        }
        if (pullDownResponseg == "")
        {
        }
        else{
        var pullDownValuesg = document.getElementById("taskThree");
        var pullDownResponseg = pullDownValuesg.options[pullDownValuesg.selectedIndex].value;
        stuffToCopy = stuffToCopy + "'n" + pullDownResponseg;
        }
        var tempValues = document.getElementById('whatUpdate').value
        if(tempValues.length > 1) 
        {
        var stuffToCopy = stuffToCopy + "Updated" + " " + document.getElementById('whatUpdate').value + " ";
        }
        else{
        }
        var tempValuess = document.getElementById('whatInfo').value
        if(tempValuess.length > 1) 
        {
        var stuffToCopy = stuffToCopy + "per" + " " + document.getElementById('whatInfo').value + "'n";
        }
        else{
        }
        var tempValue = document.getElementById('whatDSCRP').value
        if(tempValue.length > 1) 
        {
        var stuffToCopy = stuffToCopy + document.getElementById('whatDSCRP').value + " " + "dscrp on Collection tube and trf was resolved using" + " ";
        }
        else{
        }

        var tempValue = document.getElementById('resolveIT').value
        if(tempValue.length > 1) 
        {
        var stuffToCopy = stuffToCopy + document.getElementById('resolveIT').value + " ";
        }
        else{
        }
        var tempValue = document.getElementById('tubeCorrect').value
        if(tempValue.length > 1) 
        {
        var stuffToCopy = stuffToCopy + "trf was" + " " + document.getElementById('tubeCorrect').value;
        }
        else{
        }

        if(stuffToCopy.length > 1)
        {
        var stuffToCopy = stuffToCopy + "'n" + document.getElementById('moreNotes').value;
        }
        else{
        }
        if (pullDownResponsesu == "")
        {
        }
        else{
        var pullDownValuesu = document.getElementById("mod33Apply");
        var pullDownResponsesu = pullDownValuesu.options[pullDownValuesu.selectedIndex].value;
        stuffToCopy = stuffToCopy + "'n" + pullDownResponsesu;
        }
        if (pullDownResponsesb == "")
        {
        }
        else{
        var pullDownValuesb = document.getElementById("resultICR");
        var pullDownResponsesb = pullDownValuesb.options[pullDownValuesb.selectedIndex].value;
        stuffToCopy = stuffToCopy + "'n" + pullDownResponsesb + "," + " ";
        }
        if (pullDownResponsesc == "")
        {
        }
        else{
        var pullDownValuesc = document.getElementById("moneyNCIS");
        var pullDownResponsesc = pullDownValuesc.options[pullDownValuesc.selectedIndex].value;
        stuffToCopy = stuffToCopy + pullDownResponsesc + " ";
        }
        if (pullDownResponsesd == "")
        {
        }
        else{
        var pullDownValuesd = document.getElementById("resultMMT");
        var pullDownResponsesd = pullDownValuesd.options[pullDownValuesd.selectedIndex].value;
        stuffToCopy = stuffToCopy + pullDownResponsesd;
        }

        if(stuffToCopy.length > 1)
        {
        var stuffToCopy = stuffToCopy + " " + "Reason:" + " " + document.getElementById('whyNotEligible').value;
        }
        else{
        }
        if (pullDownResponsesa == "")
        {
        }
        else{
        var pullDownValuesa = document.getElementById("testReleased");
        var pullDownResponsesa = pullDownValuesa.options[pullDownValuesa.selectedIndex].value;
        stuffToCopy = stuffToCopy + "'n" + pullDownResponsesa;
        }
        window.clipboardData.setData('text', stuffToCopy);
        }
        </script>

如果有人跳过填写注释字段或跳过此示例中的下拉列表，那么它不会像我预期的那样执行代码，但在像这样复制时确实会创建一个新行：

任务已选择之一

(此处为额外行，因为未选择任务二(

任务三个选定

如果跳过任务二，我希望任务一和任务三之间没有额外的行。喜欢这个：

任务已选择之一

任务三个选定

注意：我知道拥有else {}毫无意义，但它在视觉上对我有帮助。

我创建了从我的工具复制/粘贴时的外观截图，如果您愿意，可以在此处查看：

示例 1：https://i.stack.imgur.com/YMI4z.jpg

示例 2：https://i.stack.imgur.com/ykAKb.jpg

这也是我的 html 的一个示例：

<html lang="en">
  What tasks are needed for the case?
  <br />
  <select class="style3" id="taskOne">
  <option value=""></option>
  <option value="ABN needed">ABN needed</option>
  <option value="Auth needed">Auth needed</option>
  </select>
  </html>