function hdr_ref(object)

{

	if (document.getElementById)

	{

		return document.getElementById(object);

	}

	else if (document.all)

	{

		return eval('document.all.' + object);

	}

	else

	{

		return false;

	}

}



function hdr_expand(object)

{

	var object = hdr_ref(object);



	if( !object.style )

	{

		return false;

	}

	else

	{

		object.style.display = '';

	}



	if (window.event)

	{

		window.event.cancelBubble = true;

	}

}



function hdr_contract(object)

{

	var object = hdr_ref(object);



	if( !object.style )

	{

		return false;

	}

	else

	{

		object.style.display = 'none';

	}



	if (window.event)

	{

		window.event.cancelBubble = true;

	}

}



function hdr_toggle(object, open_close, open_icon, close_icon)

{

	var object = hdr_ref(object);

	var icone = hdr_ref(open_close);



	if( !object.style )

	{

		return false;

	}



	if( object.style.display == 'none' )

	{

		object.style.display = '';

		icone.src = close_icon;

	}

	else

	{

		object.style.display = 'none';

		icone.src = open_icon;

	}

}