So If I put other content, like the button I was displaying (which I wanted to stay visible), the function would make them all disappear. I would again appreciate any help towards this matter.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
var h = 1
var r = 4
var t = 5
document.write(h += r += t)
<button OnClick="jahava()">Click Me!</button>
PS; This is not a calculator related problem, just in-general.