function switchlang(lang)
	{
	if (document.getElementById('layer_en'))
		{
		document.getElementById('layer_en').style.display='none';
		document.getElementById('select_layer_en').style.background='white';
		}
	if (document.getElementById('layer_fr'))
		{
		document.getElementById('layer_fr').style.display='none';
		document.getElementById('select_layer_fr').style.background='white';
		}
	if (document.getElementById('layer_es'))
		{
		document.getElementById('layer_es').style.display='none';
		document.getElementById('select_layer_es').style.background='white';
		}
	if (document.getElementById('layer_de'))
		{
		document.getElementById('layer_de').style.display='none';
		document.getElementById('select_layer_de').style.background='white';
		}
	if (document.getElementById('layer_pt'))
		{
		document.getElementById('layer_pt').style.display='none';
		document.getElementById('select_layer_pt').style.background='white';
		}
	eval ("document.getElementById('layer_" + lang + "').style.display='block'");
	eval ("document.getElementById('select_layer_" + lang + "').style.background='#F7DFCE'");
	}