make readonly/disable tinymce textarea
Use the configuration parameter readonly
tinyMCE.init({ ... theme : "advanced", readonly : 1});
Here is a link to a demo.
Update:What you can do to prevent users from editing content in your editor is to set the contenteditable attribute of the editors iframe body to false:
tinymce.activeEditor.getBody().setAttribute('contenteditable', false);
From version 4.3.x on you can use code below for readonly mode
tinymce.activeEditor.setMode('readonly');
and for design mode:
tinymce.activeEditor.setMode('design');
IF you only have one editor, this works:
tinymce.activeEditor.getBody().setAttribute('contenteditable', false);
If you have multiple editors, you have to select them by the id of the textarea:
tinyMCE.get('textarea_id').getBody().setAttribute('contenteditable', false);