// JavaScript Document
var getVars = new Array();
var locvartemp = ( window.location.href.indexOf( "?" ) + 1 ) ? window.location.href.substr( window.location.href.indexOf( "?" ) + 1 ) : "";
locvartemp = locvartemp.split( "&" );
for( var x = 0; x < locvartemp.length; x++ ) {
    var lvTempVar = locvartemp[x].split( "=" );
    getVars[ unescape( lvTempVar[0] ) ] = unescape( lvTempVar[1] );
}


var xmlHttp;


function begin(){
xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null){
	alert ("i-TUTOR: Browser does not support HTTP Request");
	return;
	} 
var url="start.php"
url=url+"?sid="+getVars['sid'];
url=url+"&randomid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}



function showData(){

		xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null){
		alert ("Browser does not support HTTP Request");
		return;
		} 
		var url="refresh.php?";
		url=url+"randomid="+Math.random();
		xmlHttp.onreadystatechange=stateChanged; 	
		xmlHttp.open("GET",url,true);
		xmlHttp.send(null);

} 


function addData(c,p,r,l){

		xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null){
		alert ("Browser does not support HTTP Request");
		return;
		} 
		var url="append.php";
		url=url+"?cid="+c;
		url=url+"&pid="+p;
		url=url+"&reply="+r;
		url=url+"&level="+l;
		url=url+"&randomid="+Math.random();
		xmlHttp.open("GET",url,true);
		xmlHttp.send(null);


}//addData


function newData(subj,msg,s,u){

		xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null){
		alert ("Browser does not support HTTP Request");
		return;
		} 
		var url="new.php";
		url=url+"?subj="+subj;
		url=url+"&msg="+msg;
		url=url+"&sid="+s;
		url=url+"&uid="+u;
		url=url+"randomid="+Math.random();
		xmlHttp.open("GET",url,true);
		xmlHttp.send(null);


}//addData

function stateChanged() { 
//xmlHttp=GetXmlHttpObject();
	//if(xmlHttp.status == 200){
		if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){ 
		document.getElementById("brain").innerHTML=xmlHttp.responseText;
		//document.getElementById("txt1").innerHTML="ehsan";
		} 	
	//}//if
} 


function GetXmlHttpObject(){ 
	var objXMLHttp=null;
	if (window.XMLHttpRequest){
	objXMLHttp=new XMLHttpRequest();
	}else if (window.ActiveXObject){
	objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
return objXMLHttp;
}