function chg_img(x)
{
	// Variablen
	var y = document.getElementById(x);
	var z = document.getElementById('objekt_bild');
	if (y != null)
	{
		if (y.src.indexOf('_ov') == -1)
		{
			var alt_text = y.alt;
			var new_img  = x + '.jpg';
			var img_src = folder + new_img;
			// Hauptbild wechseln
			z.src   = img_src;
			z.alt   = alt_text;
			z.title = alt_text;
			// zurücksetzen des alten Thumbs
			if (typeof(last_img_id) != "undefined" ) document.getElementById(last_img_id).src = last_img_src;
			// neuzuordnung der Variablen
			last_img_id  = x;
			last_img_src = y.src;
			// aendern der src
			var re = /_no.gif/;
			y.src = last_img_src.replace(re,'_ov.gif')
		}
	}
}

function resetter()
{
	for (var i=0; i<document.forms[0].length; i++)
	{
		if (document.forms[0].elements[i].type.substr(0,4) == 'text') document.forms[0].elements[i].value = '';
	}
}

function sender()
{
	var muser = 'info';
	var mhost = 'papp-art.net';
	var maffe = '@';
	document.location.href = 'mailto:' + muser + maffe + mhost;
}