Write Layer from Stored file?

So I'm using

var ie4 = (document.all) ? true : false;
var ns4 = (document.layers) ? true : false;
var ns6 = (document.getElementById && !document.all) ? true : false;

function hidelayer(lay) {
	if (ie4) {document.all[lay].style.visibility = "hidden";}
	if (ns4) {document.layers[lay].visibility = "hide";}
	if (ns6) {document.getElementById([lay]).style.display = "none";}
}

function showlayer(lay) {
	if (ie4) {document.all[lay].style.visibility = "visible";}
	if (ns4) {document.layers[lay].visibility = "show";}
	if (ns6) {document.getElementById([lay]).style.display = "block";}
}

function writetolayer(lay,txt) {
	if (ie4) {
	 document.all[lay].innerHTML = txt;
}

if (ns4) {
	document[lay].document.write(txt);
	document[lay].document.close();
}

if (ns6) {
	over = document.getElementById([lay]);
	range = document.createRange();
	range.setStartBefore(over);
	domfrag = range.createContextualFragment(txt);

		while (over.hasChildNodes()) {
		over.removeChild(over.lastChild);
}

	over.appendChild(domfrag);
   }
}

Code (markup):

And

<a href="javascript:writetolayer('liquidlayer','NextText');">

Code (markup):

To swap out my layers, I decided for (future) easy of use to swap layers
from a server stored file, txt or html, have js writetolayer to cover the old
layer, rinse and repeat. Now I see where the pointer is, (liquidlayer) but
I can't figure out how to pull it from an href. Opinions?

 

Swapped coding, this works great.

var srcFrame;

//External content into a layer
function loadOuter(doc) {
 srcFrame = document.getElementById("hiddenContent");
 srcFrame.src = doc;

 // workaround for missing onLoad event in IFRAME for NN6
 if (!srcFrame.onload) {
  setTimeout("transferHTML()", 500)
 }
}

function transferHTML(){
 srcContent='';
 if (srcFrame.contentDocument){
  srcContent=srcFrame.contentDocument.getElementsByTagName("BODY")[0].innerHTML;
 }
 else if (srcFrame.contentWindow){
  srcContent=srcFrame.contentWindow.document.body.innerHTML;
 }
 document.getElementById("outerDisplay").innerHTML = srcContent
}


var DocAry=new Array('');

function SelectList(v){
 if (v>0){
  loadOuter(DocAry[v-1]);
 }
}

Code (markup):

And the html

<a href="#" onClick="loadOuter('WhatEverTextOrHTMLHere.html')">SHARK WITH FRIGGIN LASERS</a>

Code (markup):