var aktiv;
    var set_category;

    function startup() {
      aktiv=window.setInterval("parent.display.scrollBy(0,-3)",40);
    }

    function startdown() {
      aktiv=window.setInterval("parent.display.scrollBy(0,3)",40);
    }

    function stop() {
      window.clearInterval(aktiv);
    }

if (document.images) {

		menu0 = new Image();
		menu0.src = "images/menu/inactive/category0.jpg";	
		menu0_active = new Image();
		menu0_active.src = "images/menu/active/category0.jpg";	

		menu1 = new Image();
		menu1.src = "images/menu/inactive/category1.jpg";	
		menu1_active = new Image();
		menu1_active.src = "images/menu/active/category1.jpg";	

		menu2 = new Image();
		menu2.src = "images/menu/inactive/category2.jpg";	
		menu2_active = new Image();
		menu2_active.src = "images/menu/active/category2.jpg";	

		menu3 = new Image();
		menu3.src = "images/menu/inactive/category3.jpg";	
		menu3_active = new Image();
		menu3_active.src = "images/menu/active/category3.jpg";	

		menu4 = new Image();
		menu4.src = "images/menu/inactive/category4.jpg";	
		menu4_active = new Image();
		menu4_active.src = "images/menu/active/category4.jpg";	

		menu5 = new Image();
		menu5.src = "images/menu/inactive/category5.jpg";	
		menu5_active = new Image();
		menu5_active.src = "images/menu/active/category5.jpg";
        
        arrow_up = new Image();
        arrow_up.src = "images/framework/pfeilup.gif";
        
        arrow_up_over = new Image();
        arrow_up_over.src = "images/framework/pfeilup_over.gif";
        
        arrow_down = new Image();
        arrow_down.src = "images/framework/pfeildown.gif";
        
        arrow_down_over = new Image();
        arrow_down_over.src = "images/framework/pfeildown_over.gif";
	
}

function swapImg(imgID,imgObjName) {
// imgID - Name des auszutauschenden Bildes
// imgObjName - Name des Bildes mit dem ausgetauscht wird
document.images[imgID].src = eval(imgObjName + ".src")
}