if (document.images) {
 menu0=new Image(); menu0.src="images/about-1.gif"; menu1=new Image(); menu1.src="images/contact-1.gif";
 menu2=new Image(); menu2.src="images/home-1.gif"; menu3=new Image(); menu3.src="images/machines-1.gif";
 menu4=new Image(); menu4.src="images/opport-1.gif"; menu5=new Image(); menu5.src="images/prices-1.gif";
}