var newWindow = null;

function openWindow(gPage,gText,gHeight,gWidth,gScroll) 
{

  if (newWindow != null) 
  {
       if (!window.newWindow.closed){window.newWindow.close()}
  }
  if (gPage != "") {nwURL=gPage}
  if (gText != "") {nwURL=nwURL+"?"+gText}
  if (gWidth != "") {nwWidth=gWidth}
  else {nwWidth="500"};
  if (gHeight != "") {nwHeight=gHeight}
  else {nwHeight="400"};
  newWindow = window.open(nwURL,"newWindow","toolbar=no,location=no,resizeable=yes,scrollbars="+gScroll+",width="+nwWidth+",height="+nwHeight,"copyhistory=no")
}