if (document.images) {
b_home_off = new Image(); b_home_off.src = "images/b_home.gif"
b_home_over = new Image(); b_home_over.src = "images/b_home_over.gif"
b_gruppo_off = new Image(); b_gruppo_off.src = "images/b_gruppo.gif"
b_gruppo_over = new Image(); b_gruppo_over.src = "images/b_gruppo_over.gif"
b_preventivi_off = new Image(); b_preventivi_off.src = "images/b_preventivi.gif"
b_preventivi_over = new Image(); b_preventivi_over.src = "images/b_preventivi_over.gif"
b_lavora_off = new Image(); b_lavora_off.src = "images/b_lavora.gif"
b_lavora_over = new Image(); b_lavora_over.src = "images/b_lavora_over.gif"
b_contatti_off = new Image(); b_contatti_off.src = "images/b_contatti.gif"
b_contatti_over = new Image(); b_contatti_over.src = "images/b_contatti_over.gif"
b_siti_off = new Image(); b_siti_off.src = "images/b_siti.jpg"
b_siti_over = new Image(); b_siti_over.src = "images/b_siti_over.jpg"
b_hostess_off = new Image(); b_hostess_off.src = "images/b_hostess.jpg"
b_hostess_over = new Image(); b_hostess_over.src = "images/b_hostess_over.jpg"
b_spa_off = new Image(); b_spa_off.src = "images/b_spa.jpg"
b_spa_over = new Image(); b_spa_over.src = "images/b_spa_over.jpg"
}

function turn_off(ImageName) {
	if (document.images != null) {
		document[ImageName].src = eval(ImageName + "_off.src");
	}
}

function turn_over(ImageName) {
	if (document.images != null) {
		document[ImageName].src = eval(ImageName + "_over.src");
	}
}