function display_object(div,id)
{
	if(document.getElementById(id).style.display == 'block')
	{
		document.getElementById(id).style.display='none';
		document.getElementById(div).style.backgroundImage='url(/img/null.gif)';
	}
	else
	{
		document.getElementById(id).style.display='block';
		document.getElementById(div).style.backgroundImage='url(/img/button_pressed.gif)';
	}
}