Simple modification needed

[h4x0rmx]

I'm working on my first AJAX application. I got some code from a book and I edited it a little bit for my purposes:

window.onload=function(){
	setTimeout('process("inner.php")',1000);
}
var xmlHttp = createXmlHttpRequestObject();
function createXmlHttpRequestObject(){
	var xmlHttp;
	try{
		xmlHttp = new XMLHttpRequest();
	}
	catch(e){
	    var XmlHttpVersions = new Array("MSXML2.XMLHTTP.6.0",
	                                    "MSXML2.XMLHTTP.5.0",
	                                    "MSXML2.XMLHTTP.4.0",
	                                    "MSXML2.XMLHTTP.3.0",
	                                    "MSXML2.XMLHTTP",
	                                    "Microsoft.XMLHTTP");
		for(var i=0; i<XmlHttpVersions.lenght && !xmlHttp; i++){
		    try{
		        xmlHttp = new ActivexObject(XmlHttpVersions[i]);
			}
			catch(e){}
		}
	}
	if(!xmlHttp){
	    alert("Error creating the XMLHttpRequest object");
	}else{
	    return xmlHttp;
	}
}
function process(phpPage){
	if(xmlHttp){
		try{
		    xmlHttp.open("GET", phpPage, true);
		    xmlHttp.onreadystatechange = handleRequestStateChange;
		    xmlHttp.send(null);
		}
		catch(e){
		    alert("Can't connect to server:\n" + e.toString());
		}
	}
}
function handleRequestStateChange(){
	myDiv = document.getElementById("myDivElement");
 	if(xmlHttp.readyState == 4 && xmlHttp.status == 200){
	        try{
	            response = xmlHttp.responseText;
	            myDiv.innerHTML = response;
	            setTimeout('process("inner.php")',1000);
			}catch(e){
		    	alert("Error reading the response: " + e.toString());
			}
	}else if(xmlHttp.readyState < 0 || xmlHttp.readyState > 4){
	    alert("There was a problem retrieving the data:\n" + xmlHttp.statusText);
 	}
}

The code as it is will refresh a <div> with the id "myDivElement" with the contents of "inner.php".
What I want to do is to have a generic code/function that will accept (1)the ID of my Div, (2)the page (php) that it should load into the div, and (3)the time that it should wait between refreshes. (I'm having different sections of the page that need to be reloaded every n seconds). It seems to me that it could be done pretty easy, but I have no idea how to do it.
Anyone could help?
I will really appreciate it!