I have a problem with changing the text in the comment field of list with comments:

If I put this text in: 
<span style="font-size:20px;"><span lang="de-ch" xml:lang="de-ch"><span style="font-family:Calibri, sans-serif;">Im Hinblick auf meine Geburt erwarte ich, <strong>dass mich die Hebammen einfühlsam behandeln werden.</strong></span></span></span>

<script type="text/javascript" charset="utf-8">

$(document).on('ready pjax:scriptcomplete',function(){
$('#question{QID} .text-item label.control-label').text('Platz für mögliche Kommentare zu dieser Frage (optional)');
});
</script> 

Then I save the script by pressing the "save" button I end up having this text: <span style="font-size:20px;"><span lang="de-ch" xml:lang="de-ch"><span style="font-family:Calibri, sans-serif;">Im Hinblick auf meine Geburt erwarte ich, <strong>dass mich die Hebammen einfühlsam behandeln werden.</strong></span></span></span> {QID} .text-item label.control-label').text('Platz für mögliche Kommentare zu dieser Frage (optional)'); }); 

Which is however not changing the text above the comment field. It deletes just half of my coding (namly that: <script type="text/javascript" charset="utf-8">$(document).on('ready pjax:scriptcomplete',function(){$('#question)
and adds this text after my question when I remove the source button:
 {QID} .text-item label.control-label').text('Platz für mögliche Kommentare zu dieser Frage (optional)'); }); 

What do I do wrong! Would you have any suggestions?
Thank you!!!

manual.limesurvey.org/Optional_settings#Security

filterxsshtml is ON.
(and you can not disable it)
You have to contact your administrator

Perfect!
As soon as I became superadministrator it worked nicely!
Thank you very much!