function schalte(bild,sichtbarkeit)
{
	if (document.all)
	{
		document.all[bild].style.visibility=sichtbarkeit;
	}
	else
	if (document.getElementById)
	{
		document.getElementById(bild).style.visibility=sichtbarkeit;
	}
	if (document.layers)
	{
		document.layers[bild].visibility =sichtbarkeit;
	}
}

function changeImages(ident,bild_)
	{
		for (var i = 0; i <= document.images.length-1; i++)
		{
			if(document.images[i].name == ident)
			{
			document.images[i].src = bild_;
			break;
			}
		}				
	}
	
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}