var default_img;
var default_width;
var default_txt;

visite=new Image(); visite.src="../images/visite_76x50.jpg";
matrimoni=new Image(); matrimoni.src="../images/matrimonio_72x50.jpg";
animazioni=new Image(); animazioni.src="../images/animazioni_32x50.jpg";
conferenze=new Image(); conferenze.src="../images/conferenze_80x50.jpg";


conferenze_1=new Image(); conferenze_1.src="../images/conferenze_cast_en_1.gif";
matrimoni_1=new Image(); matrimoni_1.src="../images/matrimoni_cast_en_1.gif";
animazioni_1=new Image(); animazioni_1.src="../images/animazioni_cast_en_1.gif";
visite_1=new Image(); visite_1.src="../images/visite_cast_en_1.gif";

function change_img(img_name) {
    default_img=document.left_img.src;
    default_width=document.left_img.width;
    default_txt=document [img_name].src;
    new_src=eval (img_name + ".src");
    new_txt=eval (img_name + "_1.src");
    document.left_img.width=eval (img_name + ".width");
    document.left_img.src=new_src;
    document [img_name].src=new_txt;
}
function clear_img(img_name) {
    document.left_img.src=default_img;
    document.left_img.width=default_width;
    document [img_name].src=default_txt;
}