function spawn_t(obj){
	curr_shown = obj.style.display == "block";
	obj.style.display = (curr_shown) ? "none" : "block";
}

function show_index(obj,obj1,obj2,obj3,obj4,obj5,obj6,obj7,obj8,obj9){
	obj.style.display = "block";
	obj1.style.display = "none";
	obj2.style.display = "none";
	obj3.style.display = "none";
	obj4.style.display = "none";
	obj5.style.display = "none";
	obj6.style.display = "none";
	obj7.style.display = "none";
	obj8.style.display = "none";
	obj9.style.display = "none";
}