// s = the div to show

function show_div(s)
{
	hidden_field = document.getElementById("current_div");
	elem_to_hide = document.getElementById(hidden_field.value);
	elem_to_hide.style.display = "none";
	elem_to_show = document.getElementById(s);
	hidden_field.value = s;	
	elem_to_show.style.display = "block";
}