How to add Bookmark without text moving

Here with I have copied the code for your reference

var a = myDoc.hyperlinkTextDestinations.add(bookmarkText.texts[0].insertionPoints[0]); 

applybookmarktoPara(bookmarkText, a, linkid)

function applybookmarktoPara(aText, a, linkid)

    {

     try{   a.name = linkid;

          var bm = myDoc.bookmarks.add(a); 

             bm.name = linkid;

                    bm.showBookmark();

        } catch(e){}

    }

Is this a scripting question?

If yes, can you show the code and a screenshot of the moving text, before running the code and after running the code.
The Bookmarks panel should be open and showing as well.

For code formatting use the "Advanced Editor" of the forum software.

Under >> you best format with Syntax Highlighting > javascript

Regards,
Uwe