function changeIt(ImageToChange, ImageToShow)
	{
if (document.images)
	{
document[ImageToChange].src = ImageToShow;
	}
	}
	if (document.images)
       {
        i1 = new Image;
        i1.src = "images/text_dka.gif";
        i2 = new Image;
        i2.src = "images/text_buchverlag.gif";
        i3 = new Image;
        i3.src = "images/text_digitalservices.gif";
		i4 = new Image;
        i4.src = "images/text_bookworld.gif";
       }