function aendern(wert,wert3){
  if(wert){
    var wert1 = '';
    var wert2 = wert1 + wert;
    bild = new Image();
    bild.src = wert2;
    imgOn = eval('bild.src');
    document[wert3].src = imgOn;
  }
}


function changePreviewImage(sPreviewImageSrc, sPopupLink)
{
	var oImage = document.vorschaubild;
	
	// Link setzen
	oLupe = document.getElementById('zoomviewer_lupe');
	oLupe.href = sPopupLink;
	
	// Grafik tauschen
	oImage.src = sPreviewImageSrc;
	oImage.onclick = function() {
		openZoomViewer(sPopupLink);
	};
} // function changePreviewImage;

function openZoomViewer(sPopupLink)
{
	var oPopUp = window.open(sPopupLink,
		"Zoom",
		"width=660,height=670,toolbar=no,location=no,directories=no," +
		"status=no,menubar=no,scrollbars=yes," +
		"resizable=yes,top=0,left=0,right=0,bottom=0"
	);
	
	if (oPopUp)
	{
		oPopUp.focus();
	} // if
} // function openZoomViewer