// JavaScript Document

var wsWindowObjectReference = null; // global variable

function wsOpenWindow(wsURL, wsName)
{
  if(wsWindowObjectReference == null || wsWindowObjectReference.closed)
  /* if the pointer to the window object in memory does not exist
     or if such pointer exists but the window was closed */

  {
    wsWindowObjectReference = window.open(wsURL, wsName, "toolbar=yes,location=yes,menubar=yes,resizable=yes,scrollbars=yes,status=yes");
    /* then create it. The new window will be created and
       will be brought on top of any other window. */
  }
  else
  {
    wsWindowObjectReference.location = wsURL;
	wsWindowObjectReference.focus();
    /* else the window reference must exist and the window
       is not closed; therefore, we can bring it back on top of any other
       window with the focus() method. There would be no need to re-create
       the window or to reload the referenced resource. */
  };
}