function OpenWindow(fPath,wName,wWidth,wHeight)
{
    window.open(fPath, wName, "left=30,top=20,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width="+wWidth+",height="+wHeight)
}
function OpenWindow2(fPath,wName,wWidth,wHeight)
{
    window.open(fPath, wName, "left=10,top=10,toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes,scrollbars=yes,resizable=yes,width="+wWidth+",height="+wHeight)
}
function OpenWindow3(fPath,wName,wWidth,wHeight)
{
    window.open(fPath, wName, "left=10,top=10,toolbar=yes,location=yes,directories=no,status=no,menubar=yes,scrollbars=yes,resizable=yes,width="+wWidth+",height="+wHeight)
}
function OpenWindow4(fPath,wName,wWidth,wHeight)
{
    window.open(fPath, wName, "left=580,top=10,toolbar=yes,location=yes,directories=no,status=no,menubar=yes,scrollbars=yes,resizable=yes,width="+wWidth+",height="+wHeight)
}
function OpenWindow5(fPath,wName,wWidth,wHeight)
{
    window.open(fPath, wName, "left=200,top=100,toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes,scrollbars=yes,resizable=yes,width="+wWidth+",height="+wHeight)
}
function SwitchPic(IMGNAME, IMGPATH)
{
    document.images[IMGNAME].src = IMGPATH;
}
function PreloadPic(IMGNAME, IMGPATH)
{
    IMGNAME     = new Image();
    IMGNAME.src = IMGPATH;
}

  PreloadPic('ro_01', 'img/b_t_on.gif');
  PreloadPic('ro_02', 'img/b_c_on.gif');
  PreloadPic('ro_03', 'img/b_p_on.gif');
  PreloadPic('ro_04', 'img/b_d_on.gif');
  PreloadPic('ro_05', 'img/b_k_on.gif');
  PreloadPic('ro_06', 'img/b_u_on.gif');
  PreloadPic('ro_07', 'img/b_f_on.gif');
  PreloadPic('ro_08', 'img/b_lesson_on.gif');