The question doesn't really make sense, since HTML and JavaScript are not associated with specific layouts. There is one HTML page the entire game runs in. What are you trying to do?
I found your video tutorial Ashley.
"JavaScript coding in Construct" youtube-ScirraVideos
That's exactly what I was looking for, Thank
Before That I did a plain Javascript tutorial for html, so I figured i could just right click make a new Javascript file and maybe a new html file add it to the project and it would work. But I noticed that the whole project's code won't work like that. You have to use add-Script file. + It just wouldn't work anyways with getElementById, or document.getSomething. i know document has to be run time. i should say that this project i had done only uses a canvas element.