// Vorladen der Buttons
		var img1out = new Image();
		img1out.src = 'material_html/btn_aktuelles.gif';
		var img2out = new Image();
		img2out.src = 'material_html/btn_lautsprecher.gif';
		var img3out = new Image();
		img3out.src = 'material_html/btn_bauelemente.gif';
		var img4out = new Image();
		img4out.src = 'material_html/btn_aq.gif';
		var img5out = new Image();
		img5out.src = 'material_html/btn_kf.gif';
		var img6out = new Image();
		img6out.src = 'material_html/btn_kontakt.gif';
		var img7out = new Image();
		img7out.src = 'material_html/btn_impressum.gif';
		var img8out = new Image();
		img8out.src = 'material_html/btn_aqbaltic7.gif';
		var img9out = new Image();
		img9out.src = 'material_html/btn_aqm2.gif';
		var img10out = new Image();
		img10out.src = 'material_html/btn_zubehoer.gif';
		var img11out = new Image();
		img11out.src = 'material_html/head_03.gif';
		
		// Vorladen der 'Hover'-buttons
		var img1over = new Image();
		img1over.src = 'material_html/btn_aktuelles_hover.gif';
		var img2over = new Image();
		img2over.src = 'material_html/btn_lautsprecher_hover.gif';
		var img3over = new Image();
		img3over.src = 'material_html/btn_bauelemente_hover.gif';
		var img4over = new Image();
		img4over.src = 'material_html/btn_aq_hover.gif';
		var img5over = new Image();
		img5over.src = 'material_html/btn_kf_hover.gif';
		var img6over = new Image();
		img6over.src = 'material_html/btn_kontakt_hover.gif';
		var img7over = new Image();
		img7over.src = 'material_html/btn_impressum_hover.gif';
		var img8over = new Image();
		img8over.src = 'material_html/btn_aqbaltic7_hover.gif';
		var img9over = new Image();
		img9over.src = 'material_html/btn_aqm2_hover.gif';
		var img10over = new Image();
		img10over.src = 'material_html/btn_zubehoer_hover.gif';
		
  function imgOut(imgName){
		  document.images[imgName].src = eval(imgName + "out.src");
		}
		function imgOver(imgName){
		  document.images[imgName].src = eval(imgName + "over.src");
		}