if (num != "0") {
obj= document.getElementById(num);
obj.setAttribute('className','active');
obj.setAttribute('class','active');
}

if (num_gallery != "0") { 
obj_gallery= document.getElementById(num_gallery);
obj_gallery.setAttribute('className','active');
obj_gallery.setAttribute('class','active');
}

if (num_menu != "0") {
obj_menu= document.getElementById(num_menu);
obj_menu.setAttribute('className','active');
obj_menu.setAttribute('class','active');
}

if (num_up != "0") {
obj_up= document.getElementById(num_up);
obj_up.setAttribute('className','active');
obj_up.setAttribute('class','active');
}