function showHideMenus(num)
{
	var totalElements              = 11;
	var obj_content_name_container = "menu_content_id_";
	var obj_content_name           = obj_content_name_container + num;
	var obj_content                = document.getElementById(obj_content_name);
	
	if(obj_content.style.display == "none")
		obj_content.style.display = "block";
	else
		obj_content.style.display = "none";
	
	for(i=1; i<=totalElements; i++)
	{
		if(i != num)
			document.getElementById(obj_content_name_container + i).style.display = "none";
	}
}