var ROOT_DIR; 

function showImg(nr, id) {
	var ziel = document.getElementById("showImg");
    name = ROOT_DIR+"imgShow.php?id="+id+"&nr="+nr;
    ziel.src=name;

    var ziel = document.getElementById("showText");
    name = ROOT_DIR+"txtShow.php?id="+id+"&nr="+nr;
    ziel.src=name;
}