Use Javascript variable in object name? [duplicate]

Answer 1

Try the following:

var id = 354;
CKEDITOR.instances['textarea'+id].insertHtml('<p>Whatever</p>');

Answer 2

You can use array notation:

CKEDITOR.instances['textarea' + id].insertHtml('<p>Whatever</p>');

Answer 3

var id = 354;
CKEDITOR.instances["textarea" + id].insertHtml('<p>Whatever</p>');

Since instances is an object, and objects essentially are hash tables you can access them with the array notation.