//preload rollover images
if (document.images) {
	home_over = new Image(226,38); 
	home_over.src="images/home_over.gif";
	about_over = new Image(226,38); 
	about_over.src="images/about_over.gif";
	products_over = new Image(226,38); 
	products_over.src="images/products_over.gif";
	how_over = new Image(226,38); 
	how_over.src="images/how_over.gif";
	slideshow_over = new Image(226,38); 
	slideshow_over.src="images/slideshow_over.gif";
	contact_over = new Image(226,38); 
	contact_over.src="images/button_contact_over.gif";
}