Your code is here:
Solution:
Change the following code from:
editor2.CustomAddons = "<span...>Insert Html</span>"
to:
editor2.CustomAddons = "<button...>Insert Html</button>"
Your code will work.
Suggestions:
You don't need to create your paste HTMl JavaScript code.
You can use the built-in funtion like:
onclick=""_Format(Editor2,'insertHTML','html code');""
onclick=""Paste_Html1('Editor2','Test Text');""
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