//From http://developer.apple.com/internet/webcontent/xmlhttpreq.html
var req;

function loadXMLDoc(url) {
	req = false;
    // branch for native XMLHttpRequest object
    if(window.XMLHttpRequest) {
    	try {
			req = new XMLHttpRequest();
        } catch(e) {
			req = false;
        }
    // branch for IE/Windows ActiveX version
    } else if(window.ActiveXObject) {
       	try {
        	req = new ActiveXObject("Msxml2.XMLHTTP");
      	} catch(e) {
        	try {
          		req = new ActiveXObject("Microsoft.XMLHTTP");
        	} catch(e) {
          		req = false;
        	}
		}
    }
	if(req) {
		req.onreadystatechange = processReqChange;
		req.open("GET", url, true);
		req.send("");
	}
}

function processReqChange() {
    // only if req shows "loaded"
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
            // ...processing statements go here...
			//ar addition:
			doPageUpdate();
        } else {
            alert("There was a problem retrieving the XML data:\n" +
                req.statusText);
        }
    }
}

/*
function doPageUpdate() {
	var theDiv = document.getElementById("how_to_include");
	theDiv.innerHTML = req.responseText;
}

<div name="how_to_include" id="how_to_include"></div>
<script language="javascript">loadXMLDoc("/html/sbs/html/biz_express/how_to_guide.html");</script>

*/