// generic popup window...
function popupWindow(URL, name, Width, Height, Left, Top) {
    popwin=open(URL,name,'width=' + Width + ',height=' + Height + ',left=' + Left + ',top=' + Top + ',status=no,location=no,toolbar=no,menubar=no,resizable=yes,scrollbars=yes');
    popwin.focus();
	if (popwin.opener == null) popwin.opener = self; // we can use opener in popup JS functions
}