var xmlHttp4;

function loadStockData() {

    xmlHttp4=GetXmlHttpObject4();
    if (xmlHttp4==null) {
        alert("O περιηγητής (browser) σας δεν υποστηρίζει την τεχνολογία AJAX.\n");
        document.getElementById("loadGraphData").style.display = 'none';
        document.getElementById("graphData").style.display = 'block';
        return;
    } 

    var url="/feeds/stockexchange.asp";
    url=url+"?sid="+Math.random();

    xmlHttp4.onreadystatechange=stateChanged4;
    xmlHttp4.open("GET",url,true);
    xmlHttp4.send(null);
} 

function stateChanged4() {
    if (xmlHttp4.readyState==4) {
        document.getElementById("graphData").innerHTML = "";
        document.getElementById("loadGraphData").style.display = 'none';
        document.getElementById("graphData").style.display = 'block';
        document.getElementById("graphData").innerHTML = xmlHttp4.responseText;
    }
}

function GetXmlHttpObject4() {
    var xmlHttp4=null;
    try {
        // Firefox, Opera 8.0+, Safari
        xmlHttp4=new XMLHttpRequest();
    } catch (e) {
        // Internet Explorer
        try {
            xmlHttp4=new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            xmlHttp4=new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttp4;
}