var obr = null;
function windowImage(adresar, subor, width_obr, height_obr)
{
if (obr) obr.close();
obr=window.open("http://www.tisk-triangl.cz/export/image.php?url="+adresar+subor,"","width="+width_obr+",height="+height_obr+",menubar=no,resizable=no,left=0,top=0");
if (obr && obr.opener == null) obr.opener = window;
return false;
};