// from http://www.devarticles.com/c/a/JavaScript/JavaScript-Remote-Scripting-Reading-Data-From-the-Server/1/

// initialize XMLHttpRequest object
var xmlobj=null;
// initialize global variables
var data=new Array();
var i=0;

// send http request
function sendRequest(doc){
    // check for existing requests
    if(xmlobj!=null&&xmlobj.readyState!=0&&xmlobj.readyState!=4){
        xmlobj.abort();
    }
    try{
        // instantiate object for Firefox, Nestcape, etc.
        xmlobj=new XMLHttpRequest();
    }
    catch(e){
        try{
            // instantiate object for Internet Explorer
            xmlobj=new ActiveXObject('Microsoft.XMLHTTP');
        }
        catch(e){
            // Ajax is not supported by the browser
            xmlobj=null;
            return false;
        }
    }
    // assign state handler
    xmlobj.onreadystatechange=stateChecker;
    // open socket connection
    xmlobj.open('GET',doc,true);
    // send request
    xmlobj.send(null);
}

// check request status
function stateChecker(){
    // if request is completed
    if(xmlobj.readyState==4){
        // if status == 200 display text file
        if(xmlobj.status==200){
		data=xmlobj.responseText;
		//document.write(data);
		document.getElementById("leftNav").innerHTML = data;
		openLastMenu();
        }
        else{
            alert('Failed to get response :'+ xmlobj.statusText);
        }
    }
}

//------------------SEND ALERT ON PAGE UNLOAD----------------------
function sendUnloadAlert(){

	var xmlobj=null;
	var d = new Date();
	var exitpage = "Stats_ExitAlert.asp?rand=" + d.getTime();

    // check for existing requests
    if(xmlobj!=null&&xmlobj.readyState!=0&&xmlobj.readyState!=4){
        xmlobj.abort();
    }
    try{
        // instantiate object for Firefox, Nestcape, etc.
        xmlobj=new XMLHttpRequest();
    }
    catch(e){
        try{
            // instantiate object for Internet Explorer
            xmlobj=new ActiveXObject('Microsoft.XMLHTTP');
        }
        catch(e){
            // Ajax is not supported by the browser
            xmlobj=null;
            return false;
        }
    }
    // assign state handler
    //xmlobj.onreadystatechange=stateCheckerStats;
    // open socket connection
    xmlobj.open('GET',exitpage,true);
    xmlobj.send(null);
}