//----------------------------------------------------------------------

function open_guarantee()
{
  var LeftPosition = ( screen.width ) ? (screen.width - 600) / 2 : 0;
  var TopPosition = ( screen.height ) ? (screen.height - 500) / 2 : 0;
  var WinSettings = "toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=350,height=350" + "top=" + TopPosition + ",left=" + LeftPosition;
  window.open("/guarantee.cfm", "Guarantee", WinSettings);
}