function show_hide(div_id)
{
	var this_div = document.getElementById(div_id);
	
	if (this_div.style.display == 'block') this_div.style.display = 'none';
	else this_div.style.display = 'block';
}



function showhideChild(div_id)
{
	if (document.getElementById(div_id).style.display == 'none')
	{
		var menu_div = document.getElementById('left_menu');
		inner_divs = menu_div.getElementsByTagName('ul');
		for (i=0; i<inner_divs.length; i++)
		{
			if (inner_divs[i].style.display == 'block') 
				inner_divs[i].style.display = "none";
		}
		outer_a = menu_div.getElementsByTagName('a');
		for (i=0; i<outer_a.length; i++)
		{
			if (outer_a[i].className == 'left_menu_on') outer_a[i].className = '';
		}
		document.getElementById(div_id).style.display='block';
		
	}
	else
	{
		document.getElementById(div_id).style.display='none';
	
	}
}