function open_window(url){
        mywin = window.open(url,"win",'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=420,height=320');
	   }
function changeIt(ImageToChange, ImageToShow)
           {
       if (document.images)
               {
               document[ImageToChange].src = ImageToShow;
               }
            }
    if (document.images)
       {
        i1 = new Image;
        i1.src = "images/pfeil.gif";
        i2 = new Image;
        i2.src = "images/bild_kl.gif";
        }
		
//