var current_header_menu = "";

function choose_header_menu(header_menu_name) {
	if (header_menu_name == current_header_menu) return false;
	
	if (current_header_menu != "") {
		old_tab = document.getElementById("tab_" + current_header_menu);
		old_header_menu = document.getElementById("header_menu_" + current_header_menu);
		old_link = document.getElementById("link_" + current_header_menu);
		
		old_header_menu.style.display = "none";
		old_tab.style.backgroundColor = "";
		old_link.style.color = "white";
	}
	
	new_tab = document.getElementById("tab_" + header_menu_name);
	new_header_menu = document.getElementById("header_menu_" + header_menu_name);
	new_link = document.getElementById("link_" + header_menu_name);
	
	new_header_menu.style.display = "block";
	new_tab.style.backgroundColor = "#d8dde3";
	new_link.style.color = "#102d59";
	new_header_menu.style.backgroundColor = "#d8dde3";
	
	
	current_header_menu = header_menu_name;
	
	return false;
}