var zoomfenster="";

function zoom(ref,wertx,werty,parameter)
{
	if (zoomfenster != "") zoomfenster.close();
	parameter="width=" +wertx+ ", height=" +werty+", "+parameter;
	zoomfenster = window.open (ref,'ref',parameter);
	zoomfenster.document.open("text/html");
	zoomfenster.document.bgColor="#FFFFFF";
	zoomfenster.document.write("<TITLE>SPCS Viewer</TITLE>");
	zoomfenster.document.write("<SPAN type='text/css' style='position:absolute; left:0px; top:0px'>");
	zoomfenster.document.write("<a href='javascript:top.close()' style='cursor:crosshair'><img src="+ref+" border=0></a>");
	zoomfenster.document.write("</SPAN>");
	zoomfenster.focus();
}