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Editorial Team
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Asked: 2026-05-15T16:14:19+00:00

I have this form with a JS function to verify that there are no

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I have this form with a JS function to verify that there are no blank fields,
but it doesn’t work.

<head>
  <script language='javascript'>
      function verifyForm(){
        var msg='';
        if(document.getElementById('field1').value==''){msg+='Field 1  \n';}
        if(document.getElementById('field2').value==''){msg+='Field 2  \n';}
        if(msg!=''){
            alert('The following entries are empty:\n\n'+msg);
            return false
        }else{
            return true }
        }
  </script>
</head>

<body>
   <form name="frmRequest2" id="frmRequest2" action="<? echo $submitURL2; ?>" method="post" onsubmit='return verifyForm();'>
   Please answer all questions and enter "NONE" where appropriate.

  <table>
    <tbody>
      <tr>
        <th>List any items you already have</th>
        <th>List any items you need to get</th>
      </tr>
      <tr>
        <td><textarea name="field1" id="field1" rows="2" cols="39"> <? echo $field1; ?> </textarea></td>
        <td><textarea name="field2" id="field2" rows="2" cols="39"> <? echo $field2; ?> </textarea></td>
      </tr>

      <tr>
        <td colspan="4" align="center" valign="top" style="border-width: 0px 0px 0px 0px;"> <br />
        <input name="submit" value="Submit Data" type="submit"/> </td>
      </tr>      
    </tbody>
  </table>
  </form>
</body>
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1 Answer

  1. Editorial Team

    You have extra closing curly braces (}) after your if clauses.

    Edited to add: The following code works as expected and ignores any leading/trailing whitespace in the fields:

    <html>

<head>
  <script language='javascript'>
      function verifyForm(){
        var msg='';
        if(document.getElementById('field1').value.replace(/\s+$|^\s+/, '') == '') {msg+='Field 1  \n';}
        if(document.getElementById('field2').value.replace(/\s+$|^\s+/, '') == '') {msg+='Field 2  \n';}
        if(msg!=''){
            alert('The following entries are empty:\n\n'+msg);
            return false;
        }else{
            return true;
        }
      }
  </script>
</head>

<body>
   <form name="frmRequest2" id="frmRequest2" action="" method="post" onsubmit='return verifyForm();'>
   Please answer all questions and enter "NONE" where appropriate.

   <table>
      <tbody>
      <tr>
        <th>List any items you already have</th>
        <th>List any items you need to get</th>
      </tr>
      <tr>
        <td><textarea name="field1" id="field1" rows="2" cols="39"></textarea></td>
        <td><textarea name="field2" id="field2" rows="2" cols="39"></textarea></td>
      </tr>

      <tr>
        <td colspan="4" align="center" valign="top" style="border-width: 0px 0px 0px 0px;">
          <input name="submit" value="Submit Data" type="submit"/>
        </td>
      </tr>
    </tbody>
  </table>

 </form>
</body>

</html>
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