Hey it's hard to understand what you want to do from this. Could you give us an idea of why this script you currently have isn't what you want? (just so we have somewhere to go from)...
Do you want to do something like this?:
basically only have one paragraph of text visible? (This can be done in way many more ways, the above is just a quick mashup to work out what you actually want to do)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
function toggleDiv(id, content)
var div = document.getElementById(id);
div.style.display = "block";
div.innerHTML = content;
<div id="block" style="display: none">randomstartcontent</div>