Changing button text onclick

Question

When I click on myButton1 button, I want the value to change to Close Curtain from Open Curtain.
HTML:

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Answer 1

this can be done easily with a vbs code (as i'm not so familiar with js )

and you're done , however this changes the Name to display only and does not change the function {onclick} , i did some researches on how to do the second one and seem there isnt' something like

btn.onclick = ".."

but i figured out a way using <"span"> tag it goes like this :

try it yourself , change the codes in sub function1 and sub function2, basically all you need to know to make it in jscript is the line

span.InnerHTML = "..." 

the rest is your code you wanna execute

hope this helps :D