Disabling Text field with Javascript when value in drop down box is from mysql

Posted by SteveJ313 on Stack Overflow See other posts from Stack Overflow or by SteveJ313
Published on 2010-05-14T04:12:50Z Indexed on 2010/05/14 4:24 UTC
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Hi

I have a simple script in HTML, using a dropdown menu. When the value 1 is selected, the user can write in the text field, if value 2 is selected, it disables the text field.

However, i changed the values of the dropdown menu, so that one value was from a mysql table(using PHP) and the other remained 'option value='1''. Yet now neither text field is disabled. Below is the code.

`<script type="text/javascript">
   function findselected() { 

      if (document.form.selmenu.value == <?php echo $id; ?>) {
      document.form.txtField.disabled=true;
          //      return false;  // not sure this line is needed
       } else {
      document.form.txtField.disabled=false;
          //      return false;  // not sure this line is needed
       }

} `

And the PHP section

if(mysql_num_rows($SQL) == 1)
{
echo "<select name='selmenu' onChange='findselected()'>"; 
echo "<label>TCA_Subject</label>";

while ($row=mysql_fetch_array($SQL)) { 
    echo "<option value='$id'>$thing</option>";
       echo "<option value='2'>Choice 2</option>"; 
    } 

    }
   echo "<option value=$userid>'Choice 1'</option>";
?>  <option value='2'>Choice 2</option>";
</select> 

I have tried taking the second option value out of the loop, putting it into html, editing the variable in the javascript function. There is not a fault with the PHP as it is retrieving the right results and displaying it, yet the text field doesnt become disabled.

Does anyone know of a possible solution?

Thanks

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