var xmlHttp;
var joirsz;
var sk=true;

function en_refresh(cim)
{

    xmlHttp=GetXmlHttpObject();
    if (xmlHttp==null)
    {
    	return
    } 
    var url = "esemenyek.php?";
    url=url+cim;
    xmlHttp.onreadystatechange=en_stateChanged;
    xmlHttp.open("GET",url,true);
    xmlHttp.send(null);
    if (sk){
        sessionkeep();
        sk=false;
    }
    

}


function en_stateChanged() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
		document.getElementById("enbox").innerHTML=xmlHttp.responseText 
	} 
}

function GetXmlHttpObject()
{ 

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


function sessionkeep() 
{ 
    joirsz=GetXmlHttpObject();
    if (joirsz==null)
    {
    	return
    } 
    var url = "sk.php";
    joirsz.onreadystatechange=sk_stateChanged;
    joirsz.open("GET",url,true);
    joirsz.send(null);
    setTimeout ( "sessionkeep()", 60000 );

}

function sk_stateChanged() 
{ 
    if (joirsz.readyState==4 || joirsz.readyState=="complete")
    { 
    } 
}