imgSwitch = false;
if(document.images) imgSwitch = true;
var base=self.location.href;
	base=base.substring(0,base.lastIndexOf("/navigate/"))+"/";

function button(name) {
     this.up = new Image(); this.up.src="grafik/oben/" + name + "_on.gif";
     this.down = new Image(); this.down.src="grafik/oben/" + name + "_off.gif";
      }
if (imgSwitch){
     navList = new Array("unternehmen", "medien", "buch-shop", "zielgruppen", "mediaservice", "leserservice", "impressum", "sitemap")
     buttons = new Array(navList.length)
            for (i=0; i<navList.length; i++) buttons[navList[i]]=new button(navList[i])
}
function drop(name) {if (imgSwitch) document.images[name].src=buttons[name].down.src}
function lift(name) {if (imgSwitch) document.images[name].src=buttons[name].up.src}