function update_image(bild_url, bild_text)
{
        img = new Image();
        img.src = "bilder/" + bild_url;
        document.images["gross_img"].src = img.src;
        text = (document.all) ? document.all["gross_text"] : document.getElementById("gross_text");
        text.innerHTML = bild_text; 
}

function private_features_checkbox(field, checkbox_id)
{
        field.form.elements[checkbox_id].checked = (field.value != '');
}

var xmlHttp = null;

function callAjaxRequest(url, assync, resulthandler)
{
    if (typeof XMLHttpRequest != 'undefined') 
    {
        xmlHttp = new XMLHttpRequest();
    }
    if (!xmlHttp) 
    {
        // Internet Explorer 6 und äer
        try 
        {
            xmlHttp  = new ActiveXObject("Msxml2.XMLHTTP");
        } 
        catch(e) 
        {
            try 
            {
                xmlHttp  = new ActiveXObject("Microsoft.XMLHTTP");
            } 
            catch(e) 
            {
                xmlHttp  = null;
            }
        }
    }
    if (xmlHttp) 
    {
        xmlHttp.open('GET', url, assync);
        if (resulthandler) 
        {
            xmlHttp.onreadystatechange = resulthandler;
        }
        xmlHttp.send(null);
        return true;
    }
    return false;
}

function update_index_body(url) 
{
    var resulthandler = function () 
    {
        if (xmlHttp.readyState == 4)
        {
            document.getElementById("index_body").innerHTML = xmlHttp.responseText;
        }
    };
    return callAjaxRequest(url + "&" + Math.random(), true, resulthandler);
}