function imgAct(imgName) {
    if (document.images) {
        document[imgName].src = eval(imgName + "on.src");
    }
}

function imgInact(imgName){
    if (document.images) { 
        document[imgName].src = eval(imgName + "off.src");
    }
}

if (document.images) {
		img3on = new Image; img3on.src = "images/h_b_italia_over.gif";
		img3off = new Image; img3off.src = "images/h_b_italia.gif";
		img4on = new Image; img4on.src = "images/h_b_english_over.gif";
		img4off = new Image; img4off.src = "images/h_b_english.gif";
		img7on = new Image; img7on.src = "images/h_b_profilo_fra_over.gif";
		img7off = new Image; img7off.src = "images/h_b_profilo_fra.gif";
		img8on = new Image; img8on.src = "images/h_b_password_fra_over.gif";
		img8off = new Image; img8off.src = "images/h_b_password_fra.gif";
		img9on = new Image; img9on.src = "images/h_b_dati_profilo_fra_over.gif";
		img9off = new Image; img9off.src = "images/h_b_dati_profilo_fra.gif";
		img10on = new Image; img10on.src = "images/h_b_dati_password_fra_over.gif";
		img10off = new Image; img10off.src = "images/h_b_dati_password_fra.gif";
		img11on = new Image; img11on.src = "images/h_b_esp_over.gif";
		img11off = new Image; img11off.src = "images/h_b_esp.gif";
}