function importWissen()
{
    if (document.implementation && document.implementation.createDocument)
    {
        xmlDoc = document.implementation.createDocument("", "", null);
        xmlDoc.onload = readItem;
    }
    else if (window.ActiveXObject)
    {
        xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
        xmlDoc.onreadystatechange = function () {
            if (xmlDoc.readyState == 4) readItem()
        };
     }
    else
    {
        //alert('Your browser can\'t handle this script');
        return;
    }
    xmlDoc.load("/zahlen/_data/wissen.xml");
    
    
}

function readItem() {
    items = xmlDoc.getElementsByTagName('item');
    nr = Math.random()*items.length;
    nr = Math.ceil(nr-1);
//    alert(nr);
//    alert(nr);
 //   alert(items[nr].childNodes.length);


    for (j=0;j<items[nr].childNodes.length;j++)
    {
        if (items[nr].childNodes[j].nodeType != 1) continue;
        if (items[nr].childNodes[j].tagName == 'satz') document.getElementById('wissen_text').innerHTML = items[nr].childNodes[j].firstChild.nodeValue;
        if (items[nr].childNodes[j].tagName == 'link') document.getElementById('wissen_link').href = items[nr].childNodes[j].firstChild.nodeValue;
        if (items[nr].childNodes[j].tagName == 'linktext') document.getElementById('wissen_link').innerHTML = items[nr].childNodes[j].firstChild.nodeValue;
    }
    window.setTimeout("readItem()", 60000); 
    
//    document.getElementById(wissen_text).innerHTML  = items[nr].getElementById('satz');
}