function hide_show_menu(div,icon) {
    obj=document.getElementById(div);
    icon=document.getElementById(icon);
    visible=(obj.style.display=="block");
    if (visible) {
        obj.style.display="none";
        icon.style.background="url(../../../images/next/menu_maximize.png) 0px 50% no-repeat";
    } else {
        obj.style.display="block";
        icon.style.background="url(../../../images/next/menu_minimize.png) 0px 50% no-repeat";
    }
}