var theImages = new Array();

theImages[0] = 'img/pool/wassermann.gif';
theImages[1] = 'img/pool/fische.gif';
theImages[2] = 'img/pool/widder.gif';
theImages[3] = 'img/pool/stier.gif';
theImages[4] = 'img/pool/zwillinge.gif';
theImages[5] = 'img/pool/krebs.gif';
theImages[6] = 'img/pool/loewe.gif';
theImages[7] = 'img/pool/jungfrau.gif';
theImages[8] = 'img/pool/waage.gif';
theImages[9] = 'img/pool/skorpion.gif';
theImages[10] = 'img/pool/schuetze.gif';
theImages[11] = 'img/pool/steinbock.gif';

var j = 0;
var p = theImages.length;
var preBuffer = new Array();
for (i = 0; i < p; i++){
   preBuffer[i] = new Image();
   preBuffer[i].src = theImages[i];
}
var whichImage = Math.round(Math.random()*(p-1));
function showImage(){
document.write('<img src="'+theImages[whichImage]+'" alt="Sternzeichen" align="middle" />');
}