function OpenWindow ( pag ) {

    myWidth = ( screen.width * 0.8 );
    if ( myWidth < 710 ) myWidth = 710;
    myHeight = ( screen.height * 0.8 );
    posx = ( screen.width - myWidth ) / 2;
    posy = ( screen.height - myHeight ) / 3;
    myWindow = window.open ( pag, "HelpWin", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,dependent=1,width="+myWidth+",height="+myHeight+",left="+posx+",top="+posy );

  }

  function OpenWindow2 ( pag ) {

    myWidth = ( screen.width * 0.8 );
    if ( myWidth < 710 ) myWidth = 710;
    myHeight = ( screen.height * 0.8 );
    posx = ( screen.width - myWidth ) / 2;
    posy = ( screen.height - myHeight ) / 3;
    posx += 100;
    posy += 100;
    myWindow2 = window.open ( pag, "HelpWin2", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,dependent=1,width="+myWidth+",height="+myHeight+",left="+posx+",top="+posy );

  }

  function OpenSizedWindow ( pag, myWidth, myHeight ) {

    posx = ( screen.width - myWidth ) / 2;
    posy = ( screen.height - myHeight ) / 3;
    myWindow3 = window.open ( pag, "HelpWin3", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,dependent=1,width="+myWidth+",height="+myHeight+",left="+posx+",top="+posy );

  }

  function OpenSizedWindow2 ( pag, myWidth, myHeight ) {

    posx = ( screen.width - myWidth ) / 2;
    posy = ( screen.height - myHeight ) / 3;
    posx += 100;
    posy += 100;
    myWindow4 = window.open ( pag, "HelpWin4", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,dependent=1,width="+myWidth+",height="+myHeight+",left="+posx+",top="+posy );

  }