var
  w=0;  

function popup(viewer,page,scrollbars,width,height)
{
	w = window.open(page,viewer,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars='+scrollbars+',resizeable=0,copyhistory=0,width='+width+',height='+height+',left=200,top=100');
	w.focus();
	return false;
}


function closepopup()
{
	if (w!=0)
	{
		w.close();
	}
	w=0;
	return false;
}