// BTH Lageplan Fotos
function showhide(ding,t,l) {
	if ( document.getElementById(ding).style.visibility == 'visible' ) {
		document.getElementById(ding).style.visibility = 'hidden';
	} else {
		document.getElementById(ding).style.top = t + 250 + 'px';
		document.getElementById(ding).style.left = l + 150 + 'px';
		document.getElementById(ding).style.visibility = 'visible';
	}
	return;
}

function bth_wechsel(id,x) {
	bild = document.getElementById(id).src;
	bild = bild.substr(0, bild.length - 5);
	document.getElementById(id).src = bild + x + '.jpg';
}