if (document.images) {
	menu1=new Image();
	menu1.src="pictures/index-projects/biosan.jpg";
	menu1a=new Image();
	menu1a.src="pictures/index-projects/cw.jpg";
	menu2=new Image();
	menu2.src="pictures/index-projects/ost.jpg";
	menu2a=new Image();
	menu2a.src="pictures/index-projects/balista.jpg";
}