arrow_normal = new Image();
arrow_normal.src = "/images/graphics/arrow_menu.gif";
	
arrow_submenu = new Image();
arrow_submenu.src = "/images/graphics/arrow_submenu.gif";	


//submenu arrow preloads in index.html

function expand_menu(sub_menu,menu_arrow)
{
	var current_node = document.getElementById(sub_menu);
	var current_state = current_node.style.display;
  current_arrow = document.getElementById(menu_arrow);
  //var current_main = document.getElementById(main_menu);
	//alldivs = document.getElementsByTagName('div');

	  /*
		for(var i=0; i< alldivs.length; i++)
		{for(i = 1; i <= 12; i++)
			alldivs[i].style.display='none';
			document.getElementById(wrapper).style.display='block';
		} 
		*/
	
	
	if(current_state == 'block')
	{
		current_node.style.display='none';
		current_arrow.src=arrow_normal.src;
	}
	else
	{
		current_node.style.display='block';
		current_arrow.src=arrow_submenu.src;
	}
	
}