function setDisplaySwitch(source_o)
{
	var element_o = document.getElementById(source_o);

	var image_o = document.getElementById(source_o + '_btn');

		if(element_o.style.display == 'none')
		{
			element_o.style.display = '';
			//image_o.src = '/website/images/btn_close.gif';
		}
		else
		{
			element_o.style.display = 'none';
			//image_o.src = '/website/images/btn_expand.gif';
		}
};

function setDisplaySwitchMap(source_o)
{
		this.closeAll()

		var element_o = document.getElementById(source_o);

		if(element_o.style.display == 'none')
		{
			element_o.style.display = '';
		}
		else
		{
			element_o.style.display = 'none';
		}
};

function setDisplaySwitchWorldMap(source_o)
{
		this.closeWorldAll()

		var element_o = document.getElementById(source_o);

		if(element_o.style.display == 'none')
		{
			element_o.style.display = '';
		}
		else
		{
			element_o.style.display = 'none';
		}
};

function closeAll()
{
	element_a = new Array('zuidholland','groningen','noordholland','flevoland');

	for(i = 0; i < element_a.length; i++)
	{
		element_o = document.getElementById(element_a[i]);
		element_o.style.display = 'none'
	}
};

function closeWorldAll()
{
	element_a = new Array('europe', 'australia', 'azie', 'america' ,'north_america', 'africa');

	for(i = 0; i < element_a.length; i++)
	{
		element_o = document.getElementById(element_a[i]);
		element_o.style.display = 'none'
	}
};

function setDistList(select_o)
{
	this.closeWorldAll()

	var element_o = document.getElementById(select_o);

	if(element_o.style.display == 'none')
	{
		element_o.style.display = '';
	}
	else
	{
		element_o.style.display = 'none';
	}
}