1) Script Title: Dynamic Ajax Content

2) Script URL (on DD): http://www.dynamicdrive.com/dynamici...jaxcontent.htm

3) Describe problem: I'm fixing a website for a client and came across one problem that I can't seem to fix. The script was added by another developer and any help in decoding this will be appreciated. The website is currently in a close beta stage but the script is below, it works fine in firefox but not in IE. IE gives an Unknown runtime error on this line:

Code:
document.getElementById(containerid).innerHTML+=page_request.responseText;
Code:
	
/***********************************************
* Dynamic Ajax Content- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/

var bustcachevar=1; //bust potential caching of external pages after initial request? (1=yes, 0=no)
var loadedobjects="";
var rootdomain="http://"+window.location.hostname;
var bustcacheparameter="";

function ajax_request(url, containerid,append_to){
	var page_request = false
	if (window.XMLHttpRequest) { // if Mozilla, Safari etc
		page_request = new XMLHttpRequest();
	}
	else if (window.ActiveXObject){ // if IE
		try {
			page_request = new ActiveXObject("Msxml2.XMLHTTP");
		} 
		catch (e){
		try{
			page_request = new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch (e){}
		}
	}
	else {
		return false
	}
	page_request.onreadystatechange=function(){
		loadpage(page_request, containerid,append_to);
	}
	if (bustcachevar) {//if bust caching of external page
		bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
	}
	page_request.open('GET', url+bustcacheparameter, true);
	page_request.send(null);
}

function save_rankings(serial_data,pid) {
	var page_request = false;
	//alert(window.location.hostname);
	if (window.XMLHttpRequest) { // if Mozilla, Safari etc
		page_request = new XMLHttpRequest();
	}
	else if (window.ActiveXObject){ // if IE
		try {
			page_request = new ActiveXObject("Msxml2.XMLHTTP");
		} 
		catch (e){
		try{
			page_request = new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch (e){}
		}
	}
	else {
		return false
	}
	bustcacheparameter=new Date().getTime();
	project_id = encodeURIComponent(pid);
	serial_info = encodeURIComponent(serial_data);
	var parameters="data[Design][rank_info]="+serial_info+"&data[Design][pid]="+project_id+"rt="+bustcacheparameter;
	//alert(window.location.hostname);
	if(window.location.hostname=="localhost") {
		
		page_request.open("POST", "/wowmylandscape.com/final/project/award_project/"+project_id, true)
	}
	else {
		page_request.open("POST", "/project/award_project/"+project_id, true)
	}
	
	page_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
	page_request.send(parameters)
	
}
function loadpage(page_request, containerid,append_to){
	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1)) {
		if(append_to==0) {
			document.getElementById(containerid).innerHTML=page_request.responseText;
		}
		else {
			document.getElementById(containerid).innerHTML+=page_request.responseText;
		}
	}
}

function loadobjs(){
	if (!document.getElementById)
	return
	for (i=0; i<arguments.length; i++){
		var file=arguments[i];
		var fileref=""
		if (loadedobjects.indexOf(file)==-1){ //Check to see if this object has not already been added to page before proceeding
			if (file.indexOf(".js")!=-1){ //If object is a js file
fileref=document.createElement('script')
fileref.setAttribute("type","text/javascript");
fileref.setAttribute("src", file);
			}
			else if (file.indexOf(".css")!=-1){ //If object is a css file
fileref=document.createElement("link")
fileref.setAttribute("rel", "stylesheet");
fileref.setAttribute("type", "text/css");
fileref.setAttribute("href", file);
			}
		}
		if (fileref!=""){
			document.getElementsByTagName("head").item(0).appendChild(fileref);
			loadedobjects+=file+" "; //Remember this object as being already added to page
		}
	}
}