var docID;

function doIt(id){
    //erstellen des requests
    var req = null;
    
    try{
        req = new XMLHttpRequest();
    }
    catch (ms){
        try{
            req = new ActiveXObject("Msxml2.XMLHTTP");
        } 
        catch (nonms){
            try{
                req = new ActiveXObject("Microsoft.XMLHTTP");
            } 
            catch (failed){
                req = null;
            }
        }  
    }
    
    if (req == null)
        alert("Error creating request object!");
      
    //anfrage erstellen (GET, url ist localhost,
    //request ist asynchron
    req.open("GET", 'data/poems.php?id='+id,true);
    
    //Beim abschliessen des request wird diese Funktion ausgeführt
    req.onreadystatechange = function(){            
        switch(req.readyState) {
        case 4:
            if(req.status!=200) {
                alert("Fehler:"+req.status); 
            }else{    
                //alert(req.responseText);
                document.getElementById("content").innerHTML = req.responseText;
            }
            break;
        default:
            return false;
            break;     
        }
    };
    req.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
    req.send(null);
}