var active;
var thumbsHi = new Array();
var thumbsLo = new Array();


// preload images
for (i=1; i<=6; i++) {

		thumbsHi[i] = new Image();
		thumbsHi[i].src = "images/th_umg_" + i + "_hi.jpg";
		thumbsLo[i] = new Image();
		thumbsLo[i].src = "images/th_umg_" + i + "_lo.jpg";
}

// mouseOver
function setThumbHi(which) {
	if (document.images) {
		whichThumb = "th_umg_" + which;
		whichBullet = "bullet_"+which
		document.images[whichThumb].src=thumbsHi[which].src;
		document.images[whichBullet].src="images/bullet_grau_kl.gif";
		return true;
	}
	else return false;
}

// mouseOut
function setThumbLo(which) {
	if (document.images && active != which) {
		whichButton = "th_umg_" + which;
		whichBullet = "bullet_"+which
		document.images[whichButton].src=thumbsLo[which].src;
		document.images[whichBullet].src="images/shim.gif";
		return true;
	}
	else return false;
}

function setThumbActive(which) {
	active=which;
	setThumbHi(which);
}