if(document.images) {
		menu01off = new Image();
		menu01off.src = "images/menutop01.jpg";
		menu01over = new Image();
		menu01over.src = "images/menutop01_over.jpg";
		
		menu02off = new Image();
		menu02off.src = "images/menutop02.jpg";
		menu02over = new Image();
	    menu02over.src = "images/menutop02_over.jpg";
		
		menu03off = new Image();
		menu03off.src = "images/menutop03.jpg";
		menu03over = new Image();
		menu03over.src = "images/menutop03_over.jpg";
		
        menu04off = new Image();
		menu04off.src = "images/menutop04.jpg";
		menu04over = new Image();
		menu04over.src = "images/menutop04_over.jpg";
}

function onoff(imgName,state) {
        if(document.images) {               
		document.images[imgName].src = eval(imgName+state+".src");
        }
}