if (document.images) {

BttNorm = new Array();
BttOver = new Array();

BttNorm[0]  = new Image();BttNorm[0].src  = "img/about-u.gif"
BttOver[0]  = new Image();BttOver[0].src  = "img/about-o.gif"
BttNorm[1]  = new Image();BttNorm[1].src  = "img/brillen-u.gif"
BttOver[1]  = new Image();BttOver[1].src  = "img/brillen-o.gif"
BttNorm[2]  = new Image();BttNorm[2].src  = "img/sbrillen-u.gif"
BttOver[2]  = new Image();BttOver[2].src  = "img/sbrillen-o.gif"
BttNorm[3]  = new Image();BttNorm[3].src  = "img/clinsen-u.gif"
BttOver[3]  = new Image();BttOver[3].src  = "img/clinsen-o.gif"
BttNorm[4]  = new Image();BttNorm[4].src  = "img/aktion-u.gif"
BttOver[4]  = new Image();BttOver[4].src  = "img/aktion-o.gif"
BttNorm[5]  = new Image();BttNorm[5].src  = "img/kartesmall.gif"
BttOver[5]  = new Image();BttOver[5].src  = "img/kartesmall.gif"
BttNorm[6]  = new Image();BttNorm[6].src  = "img/kontakt-u.gif"
BttOver[6]  = new Image();BttOver[6].src  = "img/kontakt-o.gif"
BttNorm[7]  = new Image();BttNorm[7].src  = "img/impressum-u.gif"
BttOver[7]  = new Image();BttOver[7].src  = "img/impressum-o.gif"
}

var erstesBild = 2;
var anzahlBilder  = 8;
var ImgNr = null;

function Change(Img,an) 
{	if (document.images)
	{	if (ImgNr != Img)
		{	if (an ==1)
				document.images[Img + erstesBild].src = BttOver[Img].src;
			else
				document.images[Img + erstesBild].src = BttNorm[Img].src;
		}
	}
}

function ImgAktiv(Img) 
{	if (document.images) 
	{	for (var i = 0 ; i < anzahlBilder; i++) 
		{	if (i == Img) 
				document.images[i + erstesBild].src = BttOver[i].src;
			else
				document.images[i + erstesBild].src = BttNorm[i].src;
		}
	ImgNr = Img;
	}
}