function showhide(id,img)
{
	var divObj 		= document.getElementById('menu'+id+'container');
	var shadowObj 	= document.getElementById('menu'+id+'shadow');
	var imgObj		= document.getElementById('menu'+id+'img');
	
	if(divObj.style.visibility == 'hidden' || divObj.style.visibility == '')
	{
		divObj.style.visibility = 'visible';
		shadowObj.style.visibility = 'visible';
		imgObj.src = 'images/'+img+'_over.gif';
	}
	else
	{
		divObj.style.visibility = 'hidden';
		shadowObj.style.visibility = 'hidden';
		imgObj.src = 'images/'+img+'.gif';	
	}
}

function img_swap(id,way,img)
{
	var imgObj = document.getElementById('menu'+id+'img');
	
	if(way == 'out')
	{
		imgObj.src = 'images/'+img+'.gif';
	}
	else
	{
		imgObj.src = 'images/'+img+'_aktiv.gif';
	}
}