Hello I need my code colour highlights to function more than once on a page, I am using a javascript string but with ID but this doesn’t duplicate it, it only works for the first ID then the second and third don’t work I have tried using CLASS but this doesn’t work either any help would be much appreciated…

w3CodeColor(document.getElementById("mycode"));

w3CodeColor(document.getElementsByClassName("mycode"));

Both of these don’t work

This is what I have tried already

`

w3CodeColor(document.getElementsById("mycode"));

w3CodeColor(document.getElementsByClassName("mycode"));