function OpenVenster(pagina,titel) 
{ 
  venster=window.open(pagina, "_blank",
		"toolbar=no,location=no,directories=no,status=no,menubar=no," + 
	  "scrollbars=yes,width=650,height=600,resizable=no");
}

function OpenVenster2(pagina,titel,height,width)
{
  venster=window.open(pagina, titel,
          "toolbar=no,location=no,directories=no,status=no,menubar=no," + 
	  "scrollbars=yes,width="+width+",height="+height+",resizable=no");
}